initial update

node_modules/optimism/.github/dependabot.yml

@@ -0,0 +1,9 @@
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "daily"

node_modules/optimism/.github/workflows/main.yml

@@ -0,0 +1,29 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    name: Test on node ${{ matrix.node_version }} and ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        node_version: ['16', '18', '19', '20', '21']
+        os: [ubuntu-latest]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node_version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node_version }}
+
+    - name: npm install, build and test
+      run: |
+        npm install
+        npm run build --if-present
+        npm test

node_modules/optimism/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2016 Ben Newman
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

node_modules/optimism/README.md

@@ -0,0 +1,3 @@
+# optimism [![Build Status](https://github.com/benjamn/optimism/workflows/CI/badge.svg)](https://github.com/benjamn/optimism/actions)
+
+Composable reactive caching with efficient invalidation.

node_modules/optimism/lib/bundle.cjs

@@ -0,0 +1,492 @@
+'use strict';
+
+var trie = require('@wry/trie');
+var caches$1 = require('@wry/caches');
+var context = require('@wry/context');
+
+var parentEntrySlot = new context.Slot();
+function nonReactive(fn) {
+    return parentEntrySlot.withValue(void 0, fn);
+}
+
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+var arrayFromSet = Array.from ||
+    function (set) {
+        var array = [];
+        set.forEach(function (item) { return array.push(item); });
+        return array;
+    };
+function maybeUnsubscribe(entryOrDep) {
+    var unsubscribe = entryOrDep.unsubscribe;
+    if (typeof unsubscribe === "function") {
+        entryOrDep.unsubscribe = void 0;
+        unsubscribe();
+    }
+}
+
+var emptySetPool = [];
+var POOL_TARGET_SIZE = 100;
+// Since this package might be used browsers, we should avoid using the
+// Node built-in assert module.
+function assert(condition, optionalMessage) {
+    if (!condition) {
+        throw new Error(optionalMessage || "assertion failure");
+    }
+}
+function valueIs(a, b) {
+    var len = a.length;
+    return (
+    // Unknown values are not equal to each other.
+    len > 0 &&
+        // Both values must be ordinary (or both exceptional) to be equal.
+        len === b.length &&
+        // The underlying value or exception must be the same.
+        a[len - 1] === b[len - 1]);
+}
+function valueGet(value) {
+    switch (value.length) {
+        case 0: throw new Error("unknown value");
+        case 1: return value[0];
+        case 2: throw value[1];
+    }
+}
+function valueCopy(value) {
+    return value.slice(0);
+}
+var Entry = /** @class */ (function () {
+    function Entry(fn) {
+        this.fn = fn;
+        this.parents = new Set();
+        this.childValues = new Map();
+        // When this Entry has children that are dirty, this property becomes
+        // a Set containing other Entry objects, borrowed from emptySetPool.
+        // When the set becomes empty, it gets recycled back to emptySetPool.
+        this.dirtyChildren = null;
+        this.dirty = true;
+        this.recomputing = false;
+        this.value = [];
+        this.deps = null;
+        ++Entry.count;
+    }
+    Entry.prototype.peek = function () {
+        if (this.value.length === 1 && !mightBeDirty(this)) {
+            rememberParent(this);
+            return this.value[0];
+        }
+    };
+    // This is the most important method of the Entry API, because it
+    // determines whether the cached this.value can be returned immediately,
+    // or must be recomputed. The overall performance of the caching system
+    // depends on the truth of the following observations: (1) this.dirty is
+    // usually false, (2) this.dirtyChildren is usually null/empty, and thus
+    // (3) valueGet(this.value) is usually returned without recomputation.
+    Entry.prototype.recompute = function (args) {
+        assert(!this.recomputing, "already recomputing");
+        rememberParent(this);
+        return mightBeDirty(this)
+            ? reallyRecompute(this, args)
+            : valueGet(this.value);
+    };
+    Entry.prototype.setDirty = function () {
+        if (this.dirty)
+            return;
+        this.dirty = true;
+        reportDirty(this);
+        // We can go ahead and unsubscribe here, since any further dirty
+        // notifications we receive will be redundant, and unsubscribing may
+        // free up some resources, e.g. file watchers.
+        maybeUnsubscribe(this);
+    };
+    Entry.prototype.dispose = function () {
+        var _this = this;
+        this.setDirty();
+        // Sever any dependency relationships with our own children, so those
+        // children don't retain this parent Entry in their child.parents sets,
+        // thereby preventing it from being fully garbage collected.
+        forgetChildren(this);
+        // Because this entry has been kicked out of the cache (in index.js),
+        // we've lost the ability to find out if/when this entry becomes dirty,
+        // whether that happens through a subscription, because of a direct call
+        // to entry.setDirty(), or because one of its children becomes dirty.
+        // Because of this loss of future information, we have to assume the
+        // worst (that this entry might have become dirty very soon), so we must
+        // immediately mark this entry's parents as dirty. Normally we could
+        // just call entry.setDirty() rather than calling parent.setDirty() for
+        // each parent, but that would leave this entry in parent.childValues
+        // and parent.dirtyChildren, which would prevent the child from being
+        // truly forgotten.
+        eachParent(this, function (parent, child) {
+            parent.setDirty();
+            forgetChild(parent, _this);
+        });
+    };
+    Entry.prototype.forget = function () {
+        // The code that creates Entry objects in index.ts will replace this method
+        // with one that actually removes the Entry from the cache, which will also
+        // trigger the entry.dispose method.
+        this.dispose();
+    };
+    Entry.prototype.dependOn = function (dep) {
+        dep.add(this);
+        if (!this.deps) {
+            this.deps = emptySetPool.pop() || new Set();
+        }
+        this.deps.add(dep);
+    };
+    Entry.prototype.forgetDeps = function () {
+        var _this = this;
+        if (this.deps) {
+            arrayFromSet(this.deps).forEach(function (dep) { return dep.delete(_this); });
+            this.deps.clear();
+            emptySetPool.push(this.deps);
+            this.deps = null;
+        }
+    };
+    Entry.count = 0;
+    return Entry;
+}());
+function rememberParent(child) {
+    var parent = parentEntrySlot.getValue();
+    if (parent) {
+        child.parents.add(parent);
+        if (!parent.childValues.has(child)) {
+            parent.childValues.set(child, []);
+        }
+        if (mightBeDirty(child)) {
+            reportDirtyChild(parent, child);
+        }
+        else {
+            reportCleanChild(parent, child);
+        }
+        return parent;
+    }
+}
+function reallyRecompute(entry, args) {
+    forgetChildren(entry);
+    // Set entry as the parent entry while calling recomputeNewValue(entry).
+    parentEntrySlot.withValue(entry, recomputeNewValue, [entry, args]);
+    if (maybeSubscribe(entry, args)) {
+        // If we successfully recomputed entry.value and did not fail to
+        // (re)subscribe, then this Entry is no longer explicitly dirty.
+        setClean(entry);
+    }
+    return valueGet(entry.value);
+}
+function recomputeNewValue(entry, args) {
+    entry.recomputing = true;
+    var normalizeResult = entry.normalizeResult;
+    var oldValueCopy;
+    if (normalizeResult && entry.value.length === 1) {
+        oldValueCopy = valueCopy(entry.value);
+    }
+    // Make entry.value an empty array, representing an unknown value.
+    entry.value.length = 0;
+    try {
+        // If entry.fn succeeds, entry.value will become a normal Value.
+        entry.value[0] = entry.fn.apply(null, args);
+        // If we have a viable oldValueCopy to compare with the (successfully
+        // recomputed) new entry.value, and they are not already === identical, give
+        // normalizeResult a chance to pick/choose/reuse parts of oldValueCopy[0]
+        // and/or entry.value[0] to determine the final cached entry.value.
+        if (normalizeResult && oldValueCopy && !valueIs(oldValueCopy, entry.value)) {
+            try {
+                entry.value[0] = normalizeResult(entry.value[0], oldValueCopy[0]);
+            }
+            catch (_a) {
+                // If normalizeResult throws, just use the newer value, rather than
+                // saving the exception as entry.value[1].
+            }
+        }
+    }
+    catch (e) {
+        // If entry.fn throws, entry.value will hold that exception.
+        entry.value[1] = e;
+    }
+    // Either way, this line is always reached.
+    entry.recomputing = false;
+}
+function mightBeDirty(entry) {
+    return entry.dirty || !!(entry.dirtyChildren && entry.dirtyChildren.size);
+}
+function setClean(entry) {
+    entry.dirty = false;
+    if (mightBeDirty(entry)) {
+        // This Entry may still have dirty children, in which case we can't
+        // let our parents know we're clean just yet.
+        return;
+    }
+    reportClean(entry);
+}
+function reportDirty(child) {
+    eachParent(child, reportDirtyChild);
+}
+function reportClean(child) {
+    eachParent(child, reportCleanChild);
+}
+function eachParent(child, callback) {
+    var parentCount = child.parents.size;
+    if (parentCount) {
+        var parents = arrayFromSet(child.parents);
+        for (var i = 0; i < parentCount; ++i) {
+            callback(parents[i], child);
+        }
+    }
+}
+// Let a parent Entry know that one of its children may be dirty.
+function reportDirtyChild(parent, child) {
+    // Must have called rememberParent(child) before calling
+    // reportDirtyChild(parent, child).
+    assert(parent.childValues.has(child));
+    assert(mightBeDirty(child));
+    var parentWasClean = !mightBeDirty(parent);
+    if (!parent.dirtyChildren) {
+        parent.dirtyChildren = emptySetPool.pop() || new Set;
+    }
+    else if (parent.dirtyChildren.has(child)) {
+        // If we already know this child is dirty, then we must have already
+        // informed our own parents that we are dirty, so we can terminate
+        // the recursion early.
+        return;
+    }
+    parent.dirtyChildren.add(child);
+    // If parent was clean before, it just became (possibly) dirty (according to
+    // mightBeDirty), since we just added child to parent.dirtyChildren.
+    if (parentWasClean) {
+        reportDirty(parent);
+    }
+}
+// Let a parent Entry know that one of its children is no longer dirty.
+function reportCleanChild(parent, child) {
+    // Must have called rememberChild(child) before calling
+    // reportCleanChild(parent, child).
+    assert(parent.childValues.has(child));
+    assert(!mightBeDirty(child));
+    var childValue = parent.childValues.get(child);
+    if (childValue.length === 0) {
+        parent.childValues.set(child, valueCopy(child.value));
+    }
+    else if (!valueIs(childValue, child.value)) {
+        parent.setDirty();
+    }
+    removeDirtyChild(parent, child);
+    if (mightBeDirty(parent)) {
+        return;
+    }
+    reportClean(parent);
+}
+function removeDirtyChild(parent, child) {
+    var dc = parent.dirtyChildren;
+    if (dc) {
+        dc.delete(child);
+        if (dc.size === 0) {
+            if (emptySetPool.length < POOL_TARGET_SIZE) {
+                emptySetPool.push(dc);
+            }
+            parent.dirtyChildren = null;
+        }
+    }
+}
+// Removes all children from this entry and returns an array of the
+// removed children.
+function forgetChildren(parent) {
+    if (parent.childValues.size > 0) {
+        parent.childValues.forEach(function (_value, child) {
+            forgetChild(parent, child);
+        });
+    }
+    // Remove this parent Entry from any sets to which it was added by the
+    // addToSet method.
+    parent.forgetDeps();
+    // After we forget all our children, this.dirtyChildren must be empty
+    // and therefore must have been reset to null.
+    assert(parent.dirtyChildren === null);
+}
+function forgetChild(parent, child) {
+    child.parents.delete(parent);
+    parent.childValues.delete(child);
+    removeDirtyChild(parent, child);
+}
+function maybeSubscribe(entry, args) {
+    if (typeof entry.subscribe === "function") {
+        try {
+            maybeUnsubscribe(entry); // Prevent double subscriptions.
+            entry.unsubscribe = entry.subscribe.apply(null, args);
+        }
+        catch (e) {
+            // If this Entry has a subscribe function and it threw an exception
+            // (or an unsubscribe function it previously returned now throws),
+            // return false to indicate that we were not able to subscribe (or
+            // unsubscribe), and this Entry should remain dirty.
+            entry.setDirty();
+            return false;
+        }
+    }
+    // Returning true indicates either that there was no entry.subscribe
+    // function or that it succeeded.
+    return true;
+}
+
+var EntryMethods = {
+    setDirty: true,
+    dispose: true,
+    forget: true, // Fully remove parent Entry from LRU cache and computation graph
+};
+function dep(options) {
+    var depsByKey = new Map();
+    var subscribe = options && options.subscribe;
+    function depend(key) {
+        var parent = parentEntrySlot.getValue();
+        if (parent) {
+            var dep_1 = depsByKey.get(key);
+            if (!dep_1) {
+                depsByKey.set(key, dep_1 = new Set);
+            }
+            parent.dependOn(dep_1);
+            if (typeof subscribe === "function") {
+                maybeUnsubscribe(dep_1);
+                dep_1.unsubscribe = subscribe(key);
+            }
+        }
+    }
+    depend.dirty = function dirty(key, entryMethodName) {
+        var dep = depsByKey.get(key);
+        if (dep) {
+            var m_1 = (entryMethodName &&
+                hasOwnProperty.call(EntryMethods, entryMethodName)) ? entryMethodName : "setDirty";
+            // We have to use arrayFromSet(dep).forEach instead of dep.forEach,
+            // because modifying a Set while iterating over it can cause elements in
+            // the Set to be removed from the Set before they've been iterated over.
+            arrayFromSet(dep).forEach(function (entry) { return entry[m_1](); });
+            depsByKey.delete(key);
+            maybeUnsubscribe(dep);
+        }
+    };
+    return depend;
+}
+
+// The defaultMakeCacheKey function is remarkably powerful, because it gives
+// a unique object for any shallow-identical list of arguments. If you need
+// to implement a custom makeCacheKey function, you may find it helpful to
+// delegate the final work to defaultMakeCacheKey, which is why we export it
+// here. However, you may want to avoid defaultMakeCacheKey if your runtime
+// does not support WeakMap, or you have the ability to return a string key.
+// In those cases, just write your own custom makeCacheKey functions.
+var defaultKeyTrie;
+function defaultMakeCacheKey() {
+    var args = [];
+    for (var _i = 0; _i < arguments.length; _i++) {
+        args[_i] = arguments[_i];
+    }
+    var trie$1 = defaultKeyTrie || (defaultKeyTrie = new trie.Trie(typeof WeakMap === "function"));
+    return trie$1.lookupArray(args);
+}
+var caches = new Set();
+function wrap(originalFunction, _a) {
+    var _b = _a === void 0 ? Object.create(null) : _a, _c = _b.max, max = _c === void 0 ? Math.pow(2, 16) : _c, keyArgs = _b.keyArgs, _d = _b.makeCacheKey, makeCacheKey = _d === void 0 ? defaultMakeCacheKey : _d, normalizeResult = _b.normalizeResult, subscribe = _b.subscribe, _e = _b.cache, cacheOption = _e === void 0 ? caches$1.StrongCache : _e;
+    var cache = typeof cacheOption === "function"
+        ? new cacheOption(max, function (entry) { return entry.dispose(); })
+        : cacheOption;
+    var optimistic = function () {
+        var key = makeCacheKey.apply(null, keyArgs ? keyArgs.apply(null, arguments) : arguments);
+        if (key === void 0) {
+            return originalFunction.apply(null, arguments);
+        }
+        var entry = cache.get(key);
+        if (!entry) {
+            cache.set(key, entry = new Entry(originalFunction));
+            entry.normalizeResult = normalizeResult;
+            entry.subscribe = subscribe;
+            // Give the Entry the ability to trigger cache.delete(key), even though
+            // the Entry itself does not know about key or cache.
+            entry.forget = function () { return cache.delete(key); };
+        }
+        var value = entry.recompute(Array.prototype.slice.call(arguments));
+        // Move this entry to the front of the least-recently used queue,
+        // since we just finished computing its value.
+        cache.set(key, entry);
+        caches.add(cache);
+        // Clean up any excess entries in the cache, but only if there is no
+        // active parent entry, meaning we're not in the middle of a larger
+        // computation that might be flummoxed by the cleaning.
+        if (!parentEntrySlot.hasValue()) {
+            caches.forEach(function (cache) { return cache.clean(); });
+            caches.clear();
+        }
+        return value;
+    };
+    Object.defineProperty(optimistic, "size", {
+        get: function () { return cache.size; },
+        configurable: false,
+        enumerable: false,
+    });
+    Object.freeze(optimistic.options = {
+        max: max,
+        keyArgs: keyArgs,
+        makeCacheKey: makeCacheKey,
+        normalizeResult: normalizeResult,
+        subscribe: subscribe,
+        cache: cache,
+    });
+    function dirtyKey(key) {
+        var entry = key && cache.get(key);
+        if (entry) {
+            entry.setDirty();
+        }
+    }
+    optimistic.dirtyKey = dirtyKey;
+    optimistic.dirty = function dirty() {
+        dirtyKey(makeCacheKey.apply(null, arguments));
+    };
+    function peekKey(key) {
+        var entry = key && cache.get(key);
+        if (entry) {
+            return entry.peek();
+        }
+    }
+    optimistic.peekKey = peekKey;
+    optimistic.peek = function peek() {
+        return peekKey(makeCacheKey.apply(null, arguments));
+    };
+    function forgetKey(key) {
+        return key ? cache.delete(key) : false;
+    }
+    optimistic.forgetKey = forgetKey;
+    optimistic.forget = function forget() {
+        return forgetKey(makeCacheKey.apply(null, arguments));
+    };
+    optimistic.makeCacheKey = makeCacheKey;
+    optimistic.getKey = keyArgs ? function getKey() {
+        return makeCacheKey.apply(null, keyArgs.apply(null, arguments));
+    } : makeCacheKey;
+    return Object.freeze(optimistic);
+}
+
+Object.defineProperty(exports, 'KeyTrie', {
+    enumerable: true,
+    get: function () { return trie.Trie; }
+});
+Object.defineProperty(exports, 'Slot', {
+    enumerable: true,
+    get: function () { return context.Slot; }
+});
+Object.defineProperty(exports, 'asyncFromGen', {
+    enumerable: true,
+    get: function () { return context.asyncFromGen; }
+});
+Object.defineProperty(exports, 'bindContext', {
+    enumerable: true,
+    get: function () { return context.bind; }
+});
+Object.defineProperty(exports, 'noContext', {
+    enumerable: true,
+    get: function () { return context.noContext; }
+});
+Object.defineProperty(exports, 'setTimeout', {
+    enumerable: true,
+    get: function () { return context.setTimeout; }
+});
+exports.defaultMakeCacheKey = defaultMakeCacheKey;
+exports.dep = dep;
+exports.nonReactive = nonReactive;
+exports.wrap = wrap;
+//# sourceMappingURL=bundle.cjs.map

node_modules/optimism/lib/bundle.cjs.native.js

@@ -0,0 +1,492 @@
+'use strict';
+
+var trie = require('@wry/trie');
+var caches$1 = require('@wry/caches');
+var context = require('@wry/context');
+
+var parentEntrySlot = new context.Slot();
+function nonReactive(fn) {
+    return parentEntrySlot.withValue(void 0, fn);
+}
+
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+var arrayFromSet = Array.from ||
+    function (set) {
+        var array = [];
+        set.forEach(function (item) { return array.push(item); });
+        return array;
+    };
+function maybeUnsubscribe(entryOrDep) {
+    var unsubscribe = entryOrDep.unsubscribe;
+    if (typeof unsubscribe === "function") {
+        entryOrDep.unsubscribe = void 0;
+        unsubscribe();
+    }
+}
+
+var emptySetPool = [];
+var POOL_TARGET_SIZE = 100;
+// Since this package might be used browsers, we should avoid using the
+// Node built-in assert module.
+function assert(condition, optionalMessage) {
+    if (!condition) {
+        throw new Error(optionalMessage || "assertion failure");
+    }
+}
+function valueIs(a, b) {
+    var len = a.length;
+    return (
+    // Unknown values are not equal to each other.
+    len > 0 &&
+        // Both values must be ordinary (or both exceptional) to be equal.
+        len === b.length &&
+        // The underlying value or exception must be the same.
+        a[len - 1] === b[len - 1]);
+}
+function valueGet(value) {
+    switch (value.length) {
+        case 0: throw new Error("unknown value");
+        case 1: return value[0];
+        case 2: throw value[1];
+    }
+}
+function valueCopy(value) {
+    return value.slice(0);
+}
+var Entry = /** @class */ (function () {
+    function Entry(fn) {
+        this.fn = fn;
+        this.parents = new Set();
+        this.childValues = new Map();
+        // When this Entry has children that are dirty, this property becomes
+        // a Set containing other Entry objects, borrowed from emptySetPool.
+        // When the set becomes empty, it gets recycled back to emptySetPool.
+        this.dirtyChildren = null;
+        this.dirty = true;
+        this.recomputing = false;
+        this.value = [];
+        this.deps = null;
+        ++Entry.count;
+    }
+    Entry.prototype.peek = function () {
+        if (this.value.length === 1 && !mightBeDirty(this)) {
+            rememberParent(this);
+            return this.value[0];
+        }
+    };
+    // This is the most important method of the Entry API, because it
+    // determines whether the cached this.value can be returned immediately,
+    // or must be recomputed. The overall performance of the caching system
+    // depends on the truth of the following observations: (1) this.dirty is
+    // usually false, (2) this.dirtyChildren is usually null/empty, and thus
+    // (3) valueGet(this.value) is usually returned without recomputation.
+    Entry.prototype.recompute = function (args) {
+        assert(!this.recomputing, "already recomputing");
+        rememberParent(this);
+        return mightBeDirty(this)
+            ? reallyRecompute(this, args)
+            : valueGet(this.value);
+    };
+    Entry.prototype.setDirty = function () {
+        if (this.dirty)
+            return;
+        this.dirty = true;
+        reportDirty(this);
+        // We can go ahead and unsubscribe here, since any further dirty
+        // notifications we receive will be redundant, and unsubscribing may
+        // free up some resources, e.g. file watchers.
+        maybeUnsubscribe(this);
+    };
+    Entry.prototype.dispose = function () {
+        var _this = this;
+        this.setDirty();
+        // Sever any dependency relationships with our own children, so those
+        // children don't retain this parent Entry in their child.parents sets,
+        // thereby preventing it from being fully garbage collected.
+        forgetChildren(this);
+        // Because this entry has been kicked out of the cache (in index.js),
+        // we've lost the ability to find out if/when this entry becomes dirty,
+        // whether that happens through a subscription, because of a direct call
+        // to entry.setDirty(), or because one of its children becomes dirty.
+        // Because of this loss of future information, we have to assume the
+        // worst (that this entry might have become dirty very soon), so we must
+        // immediately mark this entry's parents as dirty. Normally we could
+        // just call entry.setDirty() rather than calling parent.setDirty() for
+        // each parent, but that would leave this entry in parent.childValues
+        // and parent.dirtyChildren, which would prevent the child from being
+        // truly forgotten.
+        eachParent(this, function (parent, child) {
+            parent.setDirty();
+            forgetChild(parent, _this);
+        });
+    };
+    Entry.prototype.forget = function () {
+        // The code that creates Entry objects in index.ts will replace this method
+        // with one that actually removes the Entry from the cache, which will also
+        // trigger the entry.dispose method.
+        this.dispose();
+    };
+    Entry.prototype.dependOn = function (dep) {
+        dep.add(this);
+        if (!this.deps) {
+            this.deps = emptySetPool.pop() || new Set();
+        }
+        this.deps.add(dep);
+    };
+    Entry.prototype.forgetDeps = function () {
+        var _this = this;
+        if (this.deps) {
+            arrayFromSet(this.deps).forEach(function (dep) { return dep.delete(_this); });
+            this.deps.clear();
+            emptySetPool.push(this.deps);
+            this.deps = null;
+        }
+    };
+    Entry.count = 0;
+    return Entry;
+}());
+function rememberParent(child) {
+    var parent = parentEntrySlot.getValue();
+    if (parent) {
+        child.parents.add(parent);
+        if (!parent.childValues.has(child)) {
+            parent.childValues.set(child, []);
+        }
+        if (mightBeDirty(child)) {
+            reportDirtyChild(parent, child);
+        }
+        else {
+            reportCleanChild(parent, child);
+        }
+        return parent;
+    }
+}
+function reallyRecompute(entry, args) {
+    forgetChildren(entry);
+    // Set entry as the parent entry while calling recomputeNewValue(entry).
+    parentEntrySlot.withValue(entry, recomputeNewValue, [entry, args]);
+    if (maybeSubscribe(entry, args)) {
+        // If we successfully recomputed entry.value and did not fail to
+        // (re)subscribe, then this Entry is no longer explicitly dirty.
+        setClean(entry);
+    }
+    return valueGet(entry.value);
+}
+function recomputeNewValue(entry, args) {
+    entry.recomputing = true;
+    var normalizeResult = entry.normalizeResult;
+    var oldValueCopy;
+    if (normalizeResult && entry.value.length === 1) {
+        oldValueCopy = valueCopy(entry.value);
+    }
+    // Make entry.value an empty array, representing an unknown value.
+    entry.value.length = 0;
+    try {
+        // If entry.fn succeeds, entry.value will become a normal Value.
+        entry.value[0] = entry.fn.apply(null, args);
+        // If we have a viable oldValueCopy to compare with the (successfully
+        // recomputed) new entry.value, and they are not already === identical, give
+        // normalizeResult a chance to pick/choose/reuse parts of oldValueCopy[0]
+        // and/or entry.value[0] to determine the final cached entry.value.
+        if (normalizeResult && oldValueCopy && !valueIs(oldValueCopy, entry.value)) {
+            try {
+                entry.value[0] = normalizeResult(entry.value[0], oldValueCopy[0]);
+            }
+            catch (_a) {
+                // If normalizeResult throws, just use the newer value, rather than
+                // saving the exception as entry.value[1].
+            }
+        }
+    }
+    catch (e) {
+        // If entry.fn throws, entry.value will hold that exception.
+        entry.value[1] = e;
+    }
+    // Either way, this line is always reached.
+    entry.recomputing = false;
+}
+function mightBeDirty(entry) {
+    return entry.dirty || !!(entry.dirtyChildren && entry.dirtyChildren.size);
+}
+function setClean(entry) {
+    entry.dirty = false;
+    if (mightBeDirty(entry)) {
+        // This Entry may still have dirty children, in which case we can't
+        // let our parents know we're clean just yet.
+        return;
+    }
+    reportClean(entry);
+}
+function reportDirty(child) {
+    eachParent(child, reportDirtyChild);
+}
+function reportClean(child) {
+    eachParent(child, reportCleanChild);
+}
+function eachParent(child, callback) {
+    var parentCount = child.parents.size;
+    if (parentCount) {
+        var parents = arrayFromSet(child.parents);
+        for (var i = 0; i < parentCount; ++i) {
+            callback(parents[i], child);
+        }
+    }
+}
+// Let a parent Entry know that one of its children may be dirty.
+function reportDirtyChild(parent, child) {
+    // Must have called rememberParent(child) before calling
+    // reportDirtyChild(parent, child).
+    assert(parent.childValues.has(child));
+    assert(mightBeDirty(child));
+    var parentWasClean = !mightBeDirty(parent);
+    if (!parent.dirtyChildren) {
+        parent.dirtyChildren = emptySetPool.pop() || new Set;
+    }
+    else if (parent.dirtyChildren.has(child)) {
+        // If we already know this child is dirty, then we must have already
+        // informed our own parents that we are dirty, so we can terminate
+        // the recursion early.
+        return;
+    }
+    parent.dirtyChildren.add(child);
+    // If parent was clean before, it just became (possibly) dirty (according to
+    // mightBeDirty), since we just added child to parent.dirtyChildren.
+    if (parentWasClean) {
+        reportDirty(parent);
+    }
+}
+// Let a parent Entry know that one of its children is no longer dirty.
+function reportCleanChild(parent, child) {
+    // Must have called rememberChild(child) before calling
+    // reportCleanChild(parent, child).
+    assert(parent.childValues.has(child));
+    assert(!mightBeDirty(child));
+    var childValue = parent.childValues.get(child);
+    if (childValue.length === 0) {
+        parent.childValues.set(child, valueCopy(child.value));
+    }
+    else if (!valueIs(childValue, child.value)) {
+        parent.setDirty();
+    }
+    removeDirtyChild(parent, child);
+    if (mightBeDirty(parent)) {
+        return;
+    }
+    reportClean(parent);
+}
+function removeDirtyChild(parent, child) {
+    var dc = parent.dirtyChildren;
+    if (dc) {
+        dc.delete(child);
+        if (dc.size === 0) {
+            if (emptySetPool.length < POOL_TARGET_SIZE) {
+                emptySetPool.push(dc);
+            }
+            parent.dirtyChildren = null;
+        }
+    }
+}
+// Removes all children from this entry and returns an array of the
+// removed children.
+function forgetChildren(parent) {
+    if (parent.childValues.size > 0) {
+        parent.childValues.forEach(function (_value, child) {
+            forgetChild(parent, child);
+        });
+    }
+    // Remove this parent Entry from any sets to which it was added by the
+    // addToSet method.
+    parent.forgetDeps();
+    // After we forget all our children, this.dirtyChildren must be empty
+    // and therefore must have been reset to null.
+    assert(parent.dirtyChildren === null);
+}
+function forgetChild(parent, child) {
+    child.parents.delete(parent);
+    parent.childValues.delete(child);
+    removeDirtyChild(parent, child);
+}
+function maybeSubscribe(entry, args) {
+    if (typeof entry.subscribe === "function") {
+        try {
+            maybeUnsubscribe(entry); // Prevent double subscriptions.
+            entry.unsubscribe = entry.subscribe.apply(null, args);
+        }
+        catch (e) {
+            // If this Entry has a subscribe function and it threw an exception
+            // (or an unsubscribe function it previously returned now throws),
+            // return false to indicate that we were not able to subscribe (or
+            // unsubscribe), and this Entry should remain dirty.
+            entry.setDirty();
+            return false;
+        }
+    }
+    // Returning true indicates either that there was no entry.subscribe
+    // function or that it succeeded.
+    return true;
+}
+
+var EntryMethods = {
+    setDirty: true,
+    dispose: true,
+    forget: true, // Fully remove parent Entry from LRU cache and computation graph
+};
+function dep(options) {
+    var depsByKey = new Map();
+    var subscribe = options && options.subscribe;
+    function depend(key) {
+        var parent = parentEntrySlot.getValue();
+        if (parent) {
+            var dep_1 = depsByKey.get(key);
+            if (!dep_1) {
+                depsByKey.set(key, dep_1 = new Set);
+            }
+            parent.dependOn(dep_1);
+            if (typeof subscribe === "function") {
+                maybeUnsubscribe(dep_1);
+                dep_1.unsubscribe = subscribe(key);
+            }
+        }
+    }
+    depend.dirty = function dirty(key, entryMethodName) {
+        var dep = depsByKey.get(key);
+        if (dep) {
+            var m_1 = (entryMethodName &&
+                hasOwnProperty.call(EntryMethods, entryMethodName)) ? entryMethodName : "setDirty";
+            // We have to use arrayFromSet(dep).forEach instead of dep.forEach,
+            // because modifying a Set while iterating over it can cause elements in
+            // the Set to be removed from the Set before they've been iterated over.
+            arrayFromSet(dep).forEach(function (entry) { return entry[m_1](); });
+            depsByKey.delete(key);
+            maybeUnsubscribe(dep);
+        }
+    };
+    return depend;
+}
+
+// The defaultMakeCacheKey function is remarkably powerful, because it gives
+// a unique object for any shallow-identical list of arguments. If you need
+// to implement a custom makeCacheKey function, you may find it helpful to
+// delegate the final work to defaultMakeCacheKey, which is why we export it
+// here. However, you may want to avoid defaultMakeCacheKey if your runtime
+// does not support WeakMap, or you have the ability to return a string key.
+// In those cases, just write your own custom makeCacheKey functions.
+var defaultKeyTrie;
+function defaultMakeCacheKey() {
+    var args = [];
+    for (var _i = 0; _i < arguments.length; _i++) {
+        args[_i] = arguments[_i];
+    }
+    var trie$1 = defaultKeyTrie || (defaultKeyTrie = new trie.Trie(typeof WeakMap === "function"));
+    return trie$1.lookupArray(args);
+}
+var caches = new Set();
+function wrap(originalFunction, _a) {
+    var _b = _a === void 0 ? Object.create(null) : _a, _c = _b.max, max = _c === void 0 ? Math.pow(2, 16) : _c, keyArgs = _b.keyArgs, _d = _b.makeCacheKey, makeCacheKey = _d === void 0 ? defaultMakeCacheKey : _d, normalizeResult = _b.normalizeResult, subscribe = _b.subscribe, _e = _b.cache, cacheOption = _e === void 0 ? caches$1.StrongCache : _e;
+    var cache = typeof cacheOption === "function"
+        ? new cacheOption(max, function (entry) { return entry.dispose(); })
+        : cacheOption;
+    var optimistic = function () {
+        var key = makeCacheKey.apply(null, keyArgs ? keyArgs.apply(null, arguments) : arguments);
+        if (key === void 0) {
+            return originalFunction.apply(null, arguments);
+        }
+        var entry = cache.get(key);
+        if (!entry) {
+            cache.set(key, entry = new Entry(originalFunction));
+            entry.normalizeResult = normalizeResult;
+            entry.subscribe = subscribe;
+            // Give the Entry the ability to trigger cache.delete(key), even though
+            // the Entry itself does not know about key or cache.
+            entry.forget = function () { return cache.delete(key); };
+        }
+        var value = entry.recompute(Array.prototype.slice.call(arguments));
+        // Move this entry to the front of the least-recently used queue,
+        // since we just finished computing its value.
+        cache.set(key, entry);
+        caches.add(cache);
+        // Clean up any excess entries in the cache, but only if there is no
+        // active parent entry, meaning we're not in the middle of a larger
+        // computation that might be flummoxed by the cleaning.
+        if (!parentEntrySlot.hasValue()) {
+            caches.forEach(function (cache) { return cache.clean(); });
+            caches.clear();
+        }
+        return value;
+    };
+    Object.defineProperty(optimistic, "size", {
+        get: function () { return cache.size; },
+        configurable: false,
+        enumerable: false,
+    });
+    Object.freeze(optimistic.options = {
+        max: max,
+        keyArgs: keyArgs,
+        makeCacheKey: makeCacheKey,
+        normalizeResult: normalizeResult,
+        subscribe: subscribe,
+        cache: cache,
+    });
+    function dirtyKey(key) {
+        var entry = key && cache.get(key);
+        if (entry) {
+            entry.setDirty();
+        }
+    }
+    optimistic.dirtyKey = dirtyKey;
+    optimistic.dirty = function dirty() {
+        dirtyKey(makeCacheKey.apply(null, arguments));
+    };
+    function peekKey(key) {
+        var entry = key && cache.get(key);
+        if (entry) {
+            return entry.peek();
+        }
+    }
+    optimistic.peekKey = peekKey;
+    optimistic.peek = function peek() {
+        return peekKey(makeCacheKey.apply(null, arguments));
+    };
+    function forgetKey(key) {
+        return key ? cache.delete(key) : false;
+    }
+    optimistic.forgetKey = forgetKey;
+    optimistic.forget = function forget() {
+        return forgetKey(makeCacheKey.apply(null, arguments));
+    };
+    optimistic.makeCacheKey = makeCacheKey;
+    optimistic.getKey = keyArgs ? function getKey() {
+        return makeCacheKey.apply(null, keyArgs.apply(null, arguments));
+    } : makeCacheKey;
+    return Object.freeze(optimistic);
+}
+
+Object.defineProperty(exports, 'KeyTrie', {
+    enumerable: true,
+    get: function () { return trie.Trie; }
+});
+Object.defineProperty(exports, 'Slot', {
+    enumerable: true,
+    get: function () { return context.Slot; }
+});
+Object.defineProperty(exports, 'asyncFromGen', {
+    enumerable: true,
+    get: function () { return context.asyncFromGen; }
+});
+Object.defineProperty(exports, 'bindContext', {
+    enumerable: true,
+    get: function () { return context.bind; }
+});
+Object.defineProperty(exports, 'noContext', {
+    enumerable: true,
+    get: function () { return context.noContext; }
+});
+Object.defineProperty(exports, 'setTimeout', {
+    enumerable: true,
+    get: function () { return context.setTimeout; }
+});
+exports.defaultMakeCacheKey = defaultMakeCacheKey;
+exports.dep = dep;
+exports.nonReactive = nonReactive;
+exports.wrap = wrap;
+//# sourceMappingURL=bundle.cjs.map

node_modules/optimism/lib/context.d.ts

@@ -0,0 +1,11 @@
+import { Slot } from "@wry/context";
+import { AnyEntry } from "./entry.js";
+export declare const parentEntrySlot: {
+    readonly id: string;
+    hasValue(): boolean;
+    getValue(): AnyEntry | undefined;
+    withValue<TResult, TArgs extends any[], TThis = any>(value: AnyEntry | undefined, callback: (this: TThis, ...args: TArgs) => TResult, args?: TArgs | undefined, thisArg?: TThis | undefined): TResult;
+};
+export declare function nonReactive<R>(fn: () => R): R;
+export { Slot };
+export { bind as bindContext, noContext, setTimeout, asyncFromGen, } from "@wry/context";

node_modules/optimism/lib/context.js

@@ -0,0 +1,8 @@
+import { Slot } from "@wry/context";
+export const parentEntrySlot = new Slot();
+export function nonReactive(fn) {
+    return parentEntrySlot.withValue(void 0, fn);
+}
+export { Slot };
+export { bind as bindContext, noContext, setTimeout, asyncFromGen, } from "@wry/context";
+//# sourceMappingURL=context.js.map

node_modules/optimism/lib/context.js.map

@@ -0,0 +1 @@
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node_modules/optimism/lib/dep.d.ts

@@ -0,0 +1,19 @@
+import { AnyEntry } from "./entry.js";
+import { OptimisticWrapOptions } from "./index.js";
+import { Unsubscribable } from "./helpers.js";
+type EntryMethodName = keyof typeof EntryMethods;
+declare const EntryMethods: {
+    setDirty: boolean;
+    dispose: boolean;
+    forget: boolean;
+};
+export type OptimisticDependencyFunction<TKey> = ((key: TKey) => void) & {
+    dirty: (key: TKey, entryMethodName?: EntryMethodName) => void;
+};
+export type Dep<TKey> = Set<AnyEntry> & {
+    subscribe: OptimisticWrapOptions<[TKey]>["subscribe"];
+} & Unsubscribable;
+export declare function dep<TKey>(options?: {
+    subscribe: Dep<TKey>["subscribe"];
+}): OptimisticDependencyFunction<TKey>;
+export {};

node_modules/optimism/lib/dep.js

@@ -0,0 +1,40 @@
+import { parentEntrySlot } from "./context.js";
+import { hasOwnProperty, maybeUnsubscribe, arrayFromSet, } from "./helpers.js";
+const EntryMethods = {
+    setDirty: true,
+    dispose: true,
+    forget: true, // Fully remove parent Entry from LRU cache and computation graph
+};
+export function dep(options) {
+    const depsByKey = new Map();
+    const subscribe = options && options.subscribe;
+    function depend(key) {
+        const parent = parentEntrySlot.getValue();
+        if (parent) {
+            let dep = depsByKey.get(key);
+            if (!dep) {
+                depsByKey.set(key, dep = new Set);
+            }
+            parent.dependOn(dep);
+            if (typeof subscribe === "function") {
+                maybeUnsubscribe(dep);
+                dep.unsubscribe = subscribe(key);
+            }
+        }
+    }
+    depend.dirty = function dirty(key, entryMethodName) {
+        const dep = depsByKey.get(key);
+        if (dep) {
+            const m = (entryMethodName &&
+                hasOwnProperty.call(EntryMethods, entryMethodName)) ? entryMethodName : "setDirty";
+            // We have to use arrayFromSet(dep).forEach instead of dep.forEach,
+            // because modifying a Set while iterating over it can cause elements in
+            // the Set to be removed from the Set before they've been iterated over.
+            arrayFromSet(dep).forEach(entry => entry[m]());
+            depsByKey.delete(key);
+            maybeUnsubscribe(dep);
+        }
+    };
+    return depend;
+}
+//# sourceMappingURL=dep.js.map

node_modules/optimism/lib/dep.js.map

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node_modules/optimism/lib/entry.d.ts

@@ -0,0 +1,28 @@
+import { OptimisticWrapOptions } from "./index.js";
+import { Dep } from "./dep.js";
+import { Unsubscribable } from "./helpers.js";
+type Value<T> = [] | [T] | [void, any];
+export type AnyEntry = Entry<any, any>;
+export declare class Entry<TArgs extends any[], TValue> {
+    readonly fn: (...args: TArgs) => TValue;
+    static count: number;
+    normalizeResult: OptimisticWrapOptions<TArgs, any, any, TValue>["normalizeResult"];
+    subscribe: OptimisticWrapOptions<TArgs>["subscribe"];
+    unsubscribe: Unsubscribable["unsubscribe"];
+    readonly parents: Set<AnyEntry>;
+    readonly childValues: Map<AnyEntry, Value<any>>;
+    dirtyChildren: Set<AnyEntry> | null;
+    dirty: boolean;
+    recomputing: boolean;
+    readonly value: Value<TValue>;
+    constructor(fn: (...args: TArgs) => TValue);
+    peek(): TValue | undefined;
+    recompute(args: TArgs): TValue;
+    setDirty(): void;
+    dispose(): void;
+    forget(): void;
+    private deps;
+    dependOn(dep: Dep<any>): void;
+    forgetDeps(): void;
+}
+export {};

node_modules/optimism/lib/entry.js

@@ -0,0 +1,301 @@
+import { parentEntrySlot } from "./context.js";
+import { maybeUnsubscribe, arrayFromSet } from "./helpers.js";
+const emptySetPool = [];
+const POOL_TARGET_SIZE = 100;
+// Since this package might be used browsers, we should avoid using the
+// Node built-in assert module.
+function assert(condition, optionalMessage) {
+    if (!condition) {
+        throw new Error(optionalMessage || "assertion failure");
+    }
+}
+function valueIs(a, b) {
+    const len = a.length;
+    return (
+    // Unknown values are not equal to each other.
+    len > 0 &&
+        // Both values must be ordinary (or both exceptional) to be equal.
+        len === b.length &&
+        // The underlying value or exception must be the same.
+        a[len - 1] === b[len - 1]);
+}
+function valueGet(value) {
+    switch (value.length) {
+        case 0: throw new Error("unknown value");
+        case 1: return value[0];
+        case 2: throw value[1];
+    }
+}
+function valueCopy(value) {
+    return value.slice(0);
+}
+export class Entry {
+    constructor(fn) {
+        this.fn = fn;
+        this.parents = new Set();
+        this.childValues = new Map();
+        // When this Entry has children that are dirty, this property becomes
+        // a Set containing other Entry objects, borrowed from emptySetPool.
+        // When the set becomes empty, it gets recycled back to emptySetPool.
+        this.dirtyChildren = null;
+        this.dirty = true;
+        this.recomputing = false;
+        this.value = [];
+        this.deps = null;
+        ++Entry.count;
+    }
+    peek() {
+        if (this.value.length === 1 && !mightBeDirty(this)) {
+            rememberParent(this);
+            return this.value[0];
+        }
+    }
+    // This is the most important method of the Entry API, because it
+    // determines whether the cached this.value can be returned immediately,
+    // or must be recomputed. The overall performance of the caching system
+    // depends on the truth of the following observations: (1) this.dirty is
+    // usually false, (2) this.dirtyChildren is usually null/empty, and thus
+    // (3) valueGet(this.value) is usually returned without recomputation.
+    recompute(args) {
+        assert(!this.recomputing, "already recomputing");
+        rememberParent(this);
+        return mightBeDirty(this)
+            ? reallyRecompute(this, args)
+            : valueGet(this.value);
+    }
+    setDirty() {
+        if (this.dirty)
+            return;
+        this.dirty = true;
+        reportDirty(this);
+        // We can go ahead and unsubscribe here, since any further dirty
+        // notifications we receive will be redundant, and unsubscribing may
+        // free up some resources, e.g. file watchers.
+        maybeUnsubscribe(this);
+    }
+    dispose() {
+        this.setDirty();
+        // Sever any dependency relationships with our own children, so those
+        // children don't retain this parent Entry in their child.parents sets,
+        // thereby preventing it from being fully garbage collected.
+        forgetChildren(this);
+        // Because this entry has been kicked out of the cache (in index.js),
+        // we've lost the ability to find out if/when this entry becomes dirty,
+        // whether that happens through a subscription, because of a direct call
+        // to entry.setDirty(), or because one of its children becomes dirty.
+        // Because of this loss of future information, we have to assume the
+        // worst (that this entry might have become dirty very soon), so we must
+        // immediately mark this entry's parents as dirty. Normally we could
+        // just call entry.setDirty() rather than calling parent.setDirty() for
+        // each parent, but that would leave this entry in parent.childValues
+        // and parent.dirtyChildren, which would prevent the child from being
+        // truly forgotten.
+        eachParent(this, (parent, child) => {
+            parent.setDirty();
+            forgetChild(parent, this);
+        });
+    }
+    forget() {
+        // The code that creates Entry objects in index.ts will replace this method
+        // with one that actually removes the Entry from the cache, which will also
+        // trigger the entry.dispose method.
+        this.dispose();
+    }
+    dependOn(dep) {
+        dep.add(this);
+        if (!this.deps) {
+            this.deps = emptySetPool.pop() || new Set();
+        }
+        this.deps.add(dep);
+    }
+    forgetDeps() {
+        if (this.deps) {
+            arrayFromSet(this.deps).forEach(dep => dep.delete(this));
+            this.deps.clear();
+            emptySetPool.push(this.deps);
+            this.deps = null;
+        }
+    }
+}
+Entry.count = 0;
+function rememberParent(child) {
+    const parent = parentEntrySlot.getValue();
+    if (parent) {
+        child.parents.add(parent);
+        if (!parent.childValues.has(child)) {
+            parent.childValues.set(child, []);
+        }
+        if (mightBeDirty(child)) {
+            reportDirtyChild(parent, child);
+        }
+        else {
+            reportCleanChild(parent, child);
+        }
+        return parent;
+    }
+}
+function reallyRecompute(entry, args) {
+    forgetChildren(entry);
+    // Set entry as the parent entry while calling recomputeNewValue(entry).
+    parentEntrySlot.withValue(entry, recomputeNewValue, [entry, args]);
+    if (maybeSubscribe(entry, args)) {
+        // If we successfully recomputed entry.value and did not fail to
+        // (re)subscribe, then this Entry is no longer explicitly dirty.
+        setClean(entry);
+    }
+    return valueGet(entry.value);
+}
+function recomputeNewValue(entry, args) {
+    entry.recomputing = true;
+    const { normalizeResult } = entry;
+    let oldValueCopy;
+    if (normalizeResult && entry.value.length === 1) {
+        oldValueCopy = valueCopy(entry.value);
+    }
+    // Make entry.value an empty array, representing an unknown value.
+    entry.value.length = 0;
+    try {
+        // If entry.fn succeeds, entry.value will become a normal Value.
+        entry.value[0] = entry.fn.apply(null, args);
+        // If we have a viable oldValueCopy to compare with the (successfully
+        // recomputed) new entry.value, and they are not already === identical, give
+        // normalizeResult a chance to pick/choose/reuse parts of oldValueCopy[0]
+        // and/or entry.value[0] to determine the final cached entry.value.
+        if (normalizeResult && oldValueCopy && !valueIs(oldValueCopy, entry.value)) {
+            try {
+                entry.value[0] = normalizeResult(entry.value[0], oldValueCopy[0]);
+            }
+            catch (_a) {
+                // If normalizeResult throws, just use the newer value, rather than
+                // saving the exception as entry.value[1].
+            }
+        }
+    }
+    catch (e) {
+        // If entry.fn throws, entry.value will hold that exception.
+        entry.value[1] = e;
+    }
+    // Either way, this line is always reached.
+    entry.recomputing = false;
+}
+function mightBeDirty(entry) {
+    return entry.dirty || !!(entry.dirtyChildren && entry.dirtyChildren.size);
+}
+function setClean(entry) {
+    entry.dirty = false;
+    if (mightBeDirty(entry)) {
+        // This Entry may still have dirty children, in which case we can't
+        // let our parents know we're clean just yet.
+        return;
+    }
+    reportClean(entry);
+}
+function reportDirty(child) {
+    eachParent(child, reportDirtyChild);
+}
+function reportClean(child) {
+    eachParent(child, reportCleanChild);
+}
+function eachParent(child, callback) {
+    const parentCount = child.parents.size;
+    if (parentCount) {
+        const parents = arrayFromSet(child.parents);
+        for (let i = 0; i < parentCount; ++i) {
+            callback(parents[i], child);
+        }
+    }
+}
+// Let a parent Entry know that one of its children may be dirty.
+function reportDirtyChild(parent, child) {
+    // Must have called rememberParent(child) before calling
+    // reportDirtyChild(parent, child).
+    assert(parent.childValues.has(child));
+    assert(mightBeDirty(child));
+    const parentWasClean = !mightBeDirty(parent);
+    if (!parent.dirtyChildren) {
+        parent.dirtyChildren = emptySetPool.pop() || new Set;
+    }
+    else if (parent.dirtyChildren.has(child)) {
+        // If we already know this child is dirty, then we must have already
+        // informed our own parents that we are dirty, so we can terminate
+        // the recursion early.
+        return;
+    }
+    parent.dirtyChildren.add(child);
+    // If parent was clean before, it just became (possibly) dirty (according to
+    // mightBeDirty), since we just added child to parent.dirtyChildren.
+    if (parentWasClean) {
+        reportDirty(parent);
+    }
+}
+// Let a parent Entry know that one of its children is no longer dirty.
+function reportCleanChild(parent, child) {
+    // Must have called rememberChild(child) before calling
+    // reportCleanChild(parent, child).
+    assert(parent.childValues.has(child));
+    assert(!mightBeDirty(child));
+    const childValue = parent.childValues.get(child);
+    if (childValue.length === 0) {
+        parent.childValues.set(child, valueCopy(child.value));
+    }
+    else if (!valueIs(childValue, child.value)) {
+        parent.setDirty();
+    }
+    removeDirtyChild(parent, child);
+    if (mightBeDirty(parent)) {
+        return;
+    }
+    reportClean(parent);
+}
+function removeDirtyChild(parent, child) {
+    const dc = parent.dirtyChildren;
+    if (dc) {
+        dc.delete(child);
+        if (dc.size === 0) {
+            if (emptySetPool.length < POOL_TARGET_SIZE) {
+                emptySetPool.push(dc);
+            }
+            parent.dirtyChildren = null;
+        }
+    }
+}
+// Removes all children from this entry and returns an array of the
+// removed children.
+function forgetChildren(parent) {
+    if (parent.childValues.size > 0) {
+        parent.childValues.forEach((_value, child) => {
+            forgetChild(parent, child);
+        });
+    }
+    // Remove this parent Entry from any sets to which it was added by the
+    // addToSet method.
+    parent.forgetDeps();
+    // After we forget all our children, this.dirtyChildren must be empty
+    // and therefore must have been reset to null.
+    assert(parent.dirtyChildren === null);
+}
+function forgetChild(parent, child) {
+    child.parents.delete(parent);
+    parent.childValues.delete(child);
+    removeDirtyChild(parent, child);
+}
+function maybeSubscribe(entry, args) {
+    if (typeof entry.subscribe === "function") {
+        try {
+            maybeUnsubscribe(entry); // Prevent double subscriptions.
+            entry.unsubscribe = entry.subscribe.apply(null, args);
+        }
+        catch (e) {
+            // If this Entry has a subscribe function and it threw an exception
+            // (or an unsubscribe function it previously returned now throws),
+            // return false to indicate that we were not able to subscribe (or
+            // unsubscribe), and this Entry should remain dirty.
+            entry.setDirty();
+            return false;
+        }
+    }
+    // Returning true indicates either that there was no entry.subscribe
+    // function or that it succeeded.
+    return true;
+}
+//# sourceMappingURL=entry.js.map

node_modules/optimism/lib/helpers.d.ts

@@ -0,0 +1,7 @@
+export type NoInfer<T> = [T][T extends any ? 0 : never];
+export declare const hasOwnProperty: (v: PropertyKey) => boolean;
+export declare const arrayFromSet: <T>(set: Set<T>) => T[];
+export type Unsubscribable = {
+    unsubscribe?: void | (() => any);
+};
+export declare function maybeUnsubscribe(entryOrDep: Unsubscribable): void;

node_modules/optimism/lib/helpers.js

@@ -0,0 +1,15 @@
+export const { hasOwnProperty, } = Object.prototype;
+export const arrayFromSet = Array.from ||
+    function (set) {
+        const array = [];
+        set.forEach(item => array.push(item));
+        return array;
+    };
+export function maybeUnsubscribe(entryOrDep) {
+    const { unsubscribe } = entryOrDep;
+    if (typeof unsubscribe === "function") {
+        entryOrDep.unsubscribe = void 0;
+        unsubscribe();
+    }
+}
+//# sourceMappingURL=helpers.js.map

node_modules/optimism/lib/helpers.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"helpers.js","sourceRoot":"","sources":["../src/helpers.ts"],"names":[],"mappings":"AAEA,MAAM,CAAC,MAAM,EACX,cAAc,GACf,GAAG,MAAM,CAAC,SAAS,CAAC;AAErB,MAAM,CAAC,MAAM,YAAY,GACvB,KAAK,CAAC,IAAI;IACV,UAAU,GAAG;QACX,MAAM,KAAK,GAAU,EAAE,CAAC;QACxB,GAAG,CAAC,OAAO,CAAC,IAAI,CAAC,EAAE,CAAC,KAAK,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC,CAAC;QACtC,OAAO,KAAK,CAAC;IACf,CAAC,CAAC;AAMJ,MAAM,UAAU,gBAAgB,CAAC,UAA0B;IACzD,MAAM,EAAE,WAAW,EAAE,GAAG,UAAU,CAAC;IACnC,IAAI,OAAO,WAAW,KAAK,UAAU,EAAE;QACrC,UAAU,CAAC,WAAW,GAAG,KAAK,CAAC,CAAC;QAChC,WAAW,EAAE,CAAC;KACf;AACH,CAAC"}

node_modules/optimism/lib/index.d.ts

@@ -0,0 +1,36 @@
+import { Trie } from "@wry/trie";
+import { CommonCache } from "@wry/caches";
+import { Entry } from "./entry.js";
+import type { NoInfer } from "./helpers.js";
+export { bindContext, noContext, nonReactive, setTimeout, asyncFromGen, Slot, } from "./context.js";
+export { dep, OptimisticDependencyFunction } from "./dep.js";
+export declare function defaultMakeCacheKey(...args: any[]): object;
+export { Trie as KeyTrie };
+export type OptimisticWrapperFunction<TArgs extends any[], TResult, TKeyArgs extends any[] = TArgs, TCacheKey = any> = ((...args: TArgs) => TResult) & {
+    readonly size: number;
+    options: OptionsWithCacheInstance<TArgs, TKeyArgs, TCacheKey>;
+    dirty: (...args: TKeyArgs) => void;
+    dirtyKey: (key: TCacheKey | undefined) => void;
+    peek: (...args: TKeyArgs) => TResult | undefined;
+    peekKey: (key: TCacheKey | undefined) => TResult | undefined;
+    forget: (...args: TKeyArgs) => boolean;
+    forgetKey: (key: TCacheKey | undefined) => boolean;
+    getKey: (...args: TArgs) => TCacheKey | undefined;
+    makeCacheKey: (...args: TKeyArgs) => TCacheKey | undefined;
+};
+export { CommonCache };
+export interface CommonCacheConstructor<TCacheKey, TResult, TArgs extends any[]> extends Function {
+    new <K extends TCacheKey, V extends Entry<TArgs, TResult>>(max?: number, dispose?: (value: V, key?: K) => void): CommonCache<K, V>;
+}
+export type OptimisticWrapOptions<TArgs extends any[], TKeyArgs extends any[] = TArgs, TCacheKey = any, TResult = any> = {
+    max?: number;
+    keyArgs?: (...args: TArgs) => TKeyArgs;
+    makeCacheKey?: (...args: NoInfer<TKeyArgs>) => TCacheKey | undefined;
+    normalizeResult?: (newer: TResult, older: TResult) => TResult;
+    subscribe?: (...args: TArgs) => void | (() => any);
+    cache?: CommonCache<NoInfer<TCacheKey>, Entry<NoInfer<TArgs>, NoInfer<TResult>>> | CommonCacheConstructor<NoInfer<TCacheKey>, NoInfer<TResult>, NoInfer<TArgs>>;
+};
+export interface OptionsWithCacheInstance<TArgs extends any[], TKeyArgs extends any[] = TArgs, TCacheKey = any, TResult = any> extends OptimisticWrapOptions<TArgs, TKeyArgs, TCacheKey, TResult> {
+    cache: CommonCache<NoInfer<TCacheKey>, Entry<NoInfer<TArgs>, NoInfer<TResult>>>;
+}
+export declare function wrap<TArgs extends any[], TResult, TKeyArgs extends any[] = TArgs, TCacheKey = any>(originalFunction: (...args: TArgs) => TResult, { max, keyArgs, makeCacheKey, normalizeResult, subscribe, cache: cacheOption, }?: OptimisticWrapOptions<TArgs, TKeyArgs, TCacheKey, TResult>): OptimisticWrapperFunction<TArgs, TResult, TKeyArgs, TCacheKey>;

node_modules/optimism/lib/index.js

@@ -0,0 +1,113 @@
+import { Trie } from "@wry/trie";
+import { StrongCache } from "@wry/caches";
+import { Entry } from "./entry.js";
+import { parentEntrySlot } from "./context.js";
+// These helper functions are important for making optimism work with
+// asynchronous code. In order to register parent-child dependencies,
+// optimism needs to know about any currently active parent computations.
+// In ordinary synchronous code, the parent context is implicit in the
+// execution stack, but asynchronous code requires some extra guidance in
+// order to propagate context from one async task segment to the next.
+export { bindContext, noContext, nonReactive, setTimeout, asyncFromGen, Slot, } from "./context.js";
+// A lighter-weight dependency, similar to OptimisticWrapperFunction, except
+// with only one argument, no makeCacheKey, no wrapped function to recompute,
+// and no result value. Useful for representing dependency leaves in the graph
+// of computation. Subscriptions are supported.
+export { dep } from "./dep.js";
+// The defaultMakeCacheKey function is remarkably powerful, because it gives
+// a unique object for any shallow-identical list of arguments. If you need
+// to implement a custom makeCacheKey function, you may find it helpful to
+// delegate the final work to defaultMakeCacheKey, which is why we export it
+// here. However, you may want to avoid defaultMakeCacheKey if your runtime
+// does not support WeakMap, or you have the ability to return a string key.
+// In those cases, just write your own custom makeCacheKey functions.
+let defaultKeyTrie;
+export function defaultMakeCacheKey(...args) {
+    const trie = defaultKeyTrie || (defaultKeyTrie = new Trie(typeof WeakMap === "function"));
+    return trie.lookupArray(args);
+}
+// If you're paranoid about memory leaks, or you want to avoid using WeakMap
+// under the hood, but you still need the behavior of defaultMakeCacheKey,
+// import this constructor to create your own tries.
+export { Trie as KeyTrie };
+;
+const caches = new Set();
+export function wrap(originalFunction, { max = Math.pow(2, 16), keyArgs, makeCacheKey = defaultMakeCacheKey, normalizeResult, subscribe, cache: cacheOption = StrongCache, } = Object.create(null)) {
+    const cache = typeof cacheOption === "function"
+        ? new cacheOption(max, entry => entry.dispose())
+        : cacheOption;
+    const optimistic = function () {
+        const key = makeCacheKey.apply(null, keyArgs ? keyArgs.apply(null, arguments) : arguments);
+        if (key === void 0) {
+            return originalFunction.apply(null, arguments);
+        }
+        let entry = cache.get(key);
+        if (!entry) {
+            cache.set(key, entry = new Entry(originalFunction));
+            entry.normalizeResult = normalizeResult;
+            entry.subscribe = subscribe;
+            // Give the Entry the ability to trigger cache.delete(key), even though
+            // the Entry itself does not know about key or cache.
+            entry.forget = () => cache.delete(key);
+        }
+        const value = entry.recompute(Array.prototype.slice.call(arguments));
+        // Move this entry to the front of the least-recently used queue,
+        // since we just finished computing its value.
+        cache.set(key, entry);
+        caches.add(cache);
+        // Clean up any excess entries in the cache, but only if there is no
+        // active parent entry, meaning we're not in the middle of a larger
+        // computation that might be flummoxed by the cleaning.
+        if (!parentEntrySlot.hasValue()) {
+            caches.forEach(cache => cache.clean());
+            caches.clear();
+        }
+        return value;
+    };
+    Object.defineProperty(optimistic, "size", {
+        get: () => cache.size,
+        configurable: false,
+        enumerable: false,
+    });
+    Object.freeze(optimistic.options = {
+        max,
+        keyArgs,
+        makeCacheKey,
+        normalizeResult,
+        subscribe,
+        cache,
+    });
+    function dirtyKey(key) {
+        const entry = key && cache.get(key);
+        if (entry) {
+            entry.setDirty();
+        }
+    }
+    optimistic.dirtyKey = dirtyKey;
+    optimistic.dirty = function dirty() {
+        dirtyKey(makeCacheKey.apply(null, arguments));
+    };
+    function peekKey(key) {
+        const entry = key && cache.get(key);
+        if (entry) {
+            return entry.peek();
+        }
+    }
+    optimistic.peekKey = peekKey;
+    optimistic.peek = function peek() {
+        return peekKey(makeCacheKey.apply(null, arguments));
+    };
+    function forgetKey(key) {
+        return key ? cache.delete(key) : false;
+    }
+    optimistic.forgetKey = forgetKey;
+    optimistic.forget = function forget() {
+        return forgetKey(makeCacheKey.apply(null, arguments));
+    };
+    optimistic.makeCacheKey = makeCacheKey;
+    optimistic.getKey = keyArgs ? function getKey() {
+        return makeCacheKey.apply(null, keyArgs.apply(null, arguments));
+    } : makeCacheKey;
+    return Object.freeze(optimistic);
+}
+//# sourceMappingURL=index.js.map

node_modules/optimism/lib/index.js.map

@@ -0,0 +1 @@
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node_modules/optimism/package.json

@@ -0,0 +1,56 @@
+{
+  "name": "optimism",
+  "version": "0.18.1",
+  "author": "Ben Newman <ben@benjamn.com>",
+  "description": "Composable reactive caching with efficient invalidation.",
+  "keywords": [
+    "caching",
+    "cache",
+    "invalidation",
+    "reactive",
+    "reactivity",
+    "dependency",
+    "tracking",
+    "tracker",
+    "memoization"
+  ],
+  "type": "module",
+  "main": "lib/bundle.cjs",
+  "module": "lib/index.js",
+  "types": "lib/index.d.ts",
+  "license": "MIT",
+  "homepage": "https://github.com/benjamn/optimism#readme",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/benjamn/optimism.git"
+  },
+  "bugs": {
+    "url": "https://github.com/benjamn/optimism/issues"
+  },
+  "scripts": {
+    "build": "npm run clean && npm run tsc:es5 && tsc && rollup -c && rimraf lib/es5",
+    "tsc:es5": "tsc -p tsconfig.es5.json",
+    "clean": "rimraf lib",
+    "prepare": "npm run build",
+    "mocha": "mocha --require source-map-support/register --reporter spec --full-trace",
+    "test:cjs": "npm run mocha -- lib/tests/bundle.cjs",
+    "test:esm": "npm run mocha -- lib/tests/bundle.js",
+    "test": "npm run test:esm && npm run test:cjs"
+  },
+  "devDependencies": {
+    "@types/mocha": "^10.0.1",
+    "@types/node": "^20.2.5",
+    "@wry/equality": "^0.5.7",
+    "mocha": "^10.2.0",
+    "rimraf": "^5.0.0",
+    "rollup": "^3.20.0",
+    "source-map-support": "^0.5.19",
+    "typescript": "^5.0.2"
+  },
+  "dependencies": {
+    "@wry/caches": "^1.0.0",
+    "@wry/context": "^0.7.0",
+    "@wry/trie": "^0.5.0",
+    "tslib": "^2.3.0"
+  }
+}

node_modules/optimism/src/context.ts

@@ -0,0 +1,16 @@
+import { Slot } from "@wry/context";
+import { AnyEntry } from "./entry.js";
+
+export const parentEntrySlot = new Slot<AnyEntry | undefined>();
+
+export function nonReactive<R>(fn: () => R): R {
+  return parentEntrySlot.withValue(void 0, fn);
+}
+
+export { Slot }
+export {
+  bind as bindContext,
+  noContext,
+  setTimeout,
+  asyncFromGen,
+} from "@wry/context";

node_modules/optimism/src/dep.ts

@@ -0,0 +1,68 @@
+import { AnyEntry } from "./entry.js";
+import { OptimisticWrapOptions } from "./index.js";
+import { parentEntrySlot } from "./context.js";
+import {
+  hasOwnProperty,
+  Unsubscribable,
+  maybeUnsubscribe,
+  arrayFromSet,
+ } from "./helpers.js";
+
+type EntryMethodName = keyof typeof EntryMethods;
+const EntryMethods = {
+  setDirty: true, // Mark parent Entry as needing to be recomputed (default)
+  dispose: true,  // Detach parent Entry from parents and children, but leave in LRU cache
+  forget: true,   // Fully remove parent Entry from LRU cache and computation graph
+};
+
+export type OptimisticDependencyFunction<TKey> =
+  ((key: TKey) => void) & {
+    dirty: (key: TKey, entryMethodName?: EntryMethodName) => void;
+  };
+
+export type Dep<TKey> = Set<AnyEntry> & {
+  subscribe: OptimisticWrapOptions<[TKey]>["subscribe"];
+} & Unsubscribable;
+
+export function dep<TKey>(options?: {
+  subscribe: Dep<TKey>["subscribe"];
+}) {
+  const depsByKey = new Map<TKey, Dep<TKey>>();
+  const subscribe = options && options.subscribe;
+
+  function depend(key: TKey) {
+    const parent = parentEntrySlot.getValue();
+    if (parent) {
+      let dep = depsByKey.get(key);
+      if (!dep) {
+        depsByKey.set(key, dep = new Set as Dep<TKey>);
+      }
+      parent.dependOn(dep);
+      if (typeof subscribe === "function") {
+        maybeUnsubscribe(dep);
+        dep.unsubscribe = subscribe(key);
+      }
+    }
+  }
+
+  depend.dirty = function dirty(
+    key: TKey,
+    entryMethodName?: EntryMethodName,
+  ) {
+    const dep = depsByKey.get(key);
+    if (dep) {
+      const m: EntryMethodName = (
+        entryMethodName &&
+        hasOwnProperty.call(EntryMethods, entryMethodName)
+      ) ? entryMethodName : "setDirty";
+      // We have to use arrayFromSet(dep).forEach instead of dep.forEach,
+      // because modifying a Set while iterating over it can cause elements in
+      // the Set to be removed from the Set before they've been iterated over.
+      arrayFromSet(dep).forEach(entry => entry[m]());
+      depsByKey.delete(key);
+      maybeUnsubscribe(dep);
+    }
+  };
+
+  return depend as OptimisticDependencyFunction<TKey>;
+}

node_modules/optimism/src/entry.ts

@@ -0,0 +1,372 @@
+import { parentEntrySlot } from "./context.js";
+import { OptimisticWrapOptions } from "./index.js";
+import { Dep } from "./dep.js";
+import { maybeUnsubscribe, arrayFromSet, Unsubscribable } from "./helpers.js";
+
+const emptySetPool: Set<any>[] = [];
+const POOL_TARGET_SIZE = 100;
+
+// Since this package might be used browsers, we should avoid using the
+// Node built-in assert module.
+function assert(condition: any, optionalMessage?: string) {
+  if (! condition) {
+    throw new Error(optionalMessage || "assertion failure");
+  }
+}
+
+// Since exceptions are cached just like normal values, we need an efficient
+// way of representing unknown, ordinary, and exceptional values.
+type Value<T> =
+  | []           // unknown
+  | [T]          // known value
+  | [void, any]; // known exception
+
+function valueIs(a: Value<any>, b: Value<any>) {
+  const len = a.length;
+  return (
+    // Unknown values are not equal to each other.
+    len > 0 &&
+    // Both values must be ordinary (or both exceptional) to be equal.
+    len === b.length &&
+    // The underlying value or exception must be the same.
+    a[len - 1] === b[len - 1]
+  );
+}
+
+function valueGet<T>(value: Value<T>): T {
+  switch (value.length) {
+    case 0: throw new Error("unknown value");
+    case 1: return value[0];
+    case 2: throw value[1];
+  }
+}
+
+function valueCopy<T>(value: Value<T>): Value<T> {
+  return value.slice(0) as Value<T>;
+}
+
+export type AnyEntry = Entry<any, any>;
+
+export class Entry<TArgs extends any[], TValue> {
+  public static count = 0;
+
+  public normalizeResult: OptimisticWrapOptions<TArgs, any, any, TValue>["normalizeResult"];
+  public subscribe: OptimisticWrapOptions<TArgs>["subscribe"];
+  public unsubscribe: Unsubscribable["unsubscribe"];
+
+  public readonly parents = new Set<AnyEntry>();
+  public readonly childValues = new Map<AnyEntry, Value<any>>();
+
+  // When this Entry has children that are dirty, this property becomes
+  // a Set containing other Entry objects, borrowed from emptySetPool.
+  // When the set becomes empty, it gets recycled back to emptySetPool.
+  public dirtyChildren: Set<AnyEntry> | null = null;
+
+  public dirty = true;
+  public recomputing = false;
+  public readonly value: Value<TValue> = [];
+
+  constructor(
+    public readonly fn: (...args: TArgs) => TValue,
+  ) {
+    ++Entry.count;
+  }
+
+  public peek(): TValue | undefined {
+    if (this.value.length === 1 && !mightBeDirty(this)) {
+      rememberParent(this);
+      return this.value[0];
+    }
+  }
+
+  // This is the most important method of the Entry API, because it
+  // determines whether the cached this.value can be returned immediately,
+  // or must be recomputed. The overall performance of the caching system
+  // depends on the truth of the following observations: (1) this.dirty is
+  // usually false, (2) this.dirtyChildren is usually null/empty, and thus
+  // (3) valueGet(this.value) is usually returned without recomputation.
+  public recompute(args: TArgs): TValue {
+    assert(! this.recomputing, "already recomputing");
+    rememberParent(this);
+    return mightBeDirty(this)
+      ? reallyRecompute(this, args)
+      : valueGet(this.value);
+  }
+
+  public setDirty() {
+    if (this.dirty) return;
+    this.dirty = true;
+    reportDirty(this);
+    // We can go ahead and unsubscribe here, since any further dirty
+    // notifications we receive will be redundant, and unsubscribing may
+    // free up some resources, e.g. file watchers.
+    maybeUnsubscribe(this);
+  }
+
+  public dispose() {
+    this.setDirty();
+
+    // Sever any dependency relationships with our own children, so those
+    // children don't retain this parent Entry in their child.parents sets,
+    // thereby preventing it from being fully garbage collected.
+    forgetChildren(this);
+
+    // Because this entry has been kicked out of the cache (in index.js),
+    // we've lost the ability to find out if/when this entry becomes dirty,
+    // whether that happens through a subscription, because of a direct call
+    // to entry.setDirty(), or because one of its children becomes dirty.
+    // Because of this loss of future information, we have to assume the
+    // worst (that this entry might have become dirty very soon), so we must
+    // immediately mark this entry's parents as dirty. Normally we could
+    // just call entry.setDirty() rather than calling parent.setDirty() for
+    // each parent, but that would leave this entry in parent.childValues
+    // and parent.dirtyChildren, which would prevent the child from being
+    // truly forgotten.
+    eachParent(this, (parent, child) => {
+      parent.setDirty();
+      forgetChild(parent, this);
+    });
+  }
+
+  public forget() {
+    // The code that creates Entry objects in index.ts will replace this method
+    // with one that actually removes the Entry from the cache, which will also
+    // trigger the entry.dispose method.
+    this.dispose();
+  }
+
+  private deps: Set<Dep<any>> | null = null;
+
+  public dependOn(dep: Dep<any>) {
+    dep.add(this);
+    if (! this.deps) {
+      this.deps = emptySetPool.pop() || new Set<Set<AnyEntry>>();
+    }
+    this.deps.add(dep);
+  }
+
+  public forgetDeps() {
+    if (this.deps) {
+      arrayFromSet(this.deps).forEach(dep => dep.delete(this));
+      this.deps.clear();
+      emptySetPool.push(this.deps);
+      this.deps = null;
+    }
+  }
+}
+
+function rememberParent(child: AnyEntry) {
+  const parent = parentEntrySlot.getValue();
+  if (parent) {
+    child.parents.add(parent);
+
+    if (! parent.childValues.has(child)) {
+      parent.childValues.set(child, []);
+    }
+
+    if (mightBeDirty(child)) {
+      reportDirtyChild(parent, child);
+    } else {
+      reportCleanChild(parent, child);
+    }
+
+    return parent;
+  }
+}
+
+function reallyRecompute(entry: AnyEntry, args: any[]) {
+  forgetChildren(entry);
+
+  // Set entry as the parent entry while calling recomputeNewValue(entry).
+  parentEntrySlot.withValue(entry, recomputeNewValue, [entry, args]);
+
+  if (maybeSubscribe(entry, args)) {
+    // If we successfully recomputed entry.value and did not fail to
+    // (re)subscribe, then this Entry is no longer explicitly dirty.
+    setClean(entry);
+  }
+
+  return valueGet(entry.value);
+}
+
+function recomputeNewValue(entry: AnyEntry, args: any[]) {
+  entry.recomputing = true;
+
+  const { normalizeResult } = entry;
+  let oldValueCopy: Value<any> | undefined;
+  if (normalizeResult && entry.value.length === 1) {
+    oldValueCopy = valueCopy(entry.value);
+  }
+
+  // Make entry.value an empty array, representing an unknown value.
+  entry.value.length = 0;
+
+  try {
+    // If entry.fn succeeds, entry.value will become a normal Value.
+    entry.value[0] = entry.fn.apply(null, args);
+
+    // If we have a viable oldValueCopy to compare with the (successfully
+    // recomputed) new entry.value, and they are not already === identical, give
+    // normalizeResult a chance to pick/choose/reuse parts of oldValueCopy[0]
+    // and/or entry.value[0] to determine the final cached entry.value.
+    if (normalizeResult && oldValueCopy && !valueIs(oldValueCopy, entry.value)) {
+      try {
+        entry.value[0] = normalizeResult(entry.value[0], oldValueCopy[0]);
+      } catch {
+        // If normalizeResult throws, just use the newer value, rather than
+        // saving the exception as entry.value[1].
+      }
+    }
+
+  } catch (e) {
+    // If entry.fn throws, entry.value will hold that exception.
+    entry.value[1] = e;
+  }
+
+  // Either way, this line is always reached.
+  entry.recomputing = false;
+}
+
+function mightBeDirty(entry: AnyEntry) {
+  return entry.dirty || !!(entry.dirtyChildren && entry.dirtyChildren.size);
+}
+
+function setClean(entry: AnyEntry) {
+  entry.dirty = false;
+
+  if (mightBeDirty(entry)) {
+    // This Entry may still have dirty children, in which case we can't
+    // let our parents know we're clean just yet.
+    return;
+  }
+
+  reportClean(entry);
+}
+
+function reportDirty(child: AnyEntry) {
+  eachParent(child, reportDirtyChild);
+}
+
+function reportClean(child: AnyEntry) {
+  eachParent(child, reportCleanChild);
+}
+
+function eachParent(
+  child: AnyEntry,
+  callback: (parent: AnyEntry, child: AnyEntry) => any,
+) {
+  const parentCount = child.parents.size;
+  if (parentCount) {
+    const parents = arrayFromSet(child.parents);
+    for (let i = 0; i < parentCount; ++i) {
+      callback(parents[i], child);
+    }
+  }
+}
+
+// Let a parent Entry know that one of its children may be dirty.
+function reportDirtyChild(parent: AnyEntry, child: AnyEntry) {
+  // Must have called rememberParent(child) before calling
+  // reportDirtyChild(parent, child).
+  assert(parent.childValues.has(child));
+  assert(mightBeDirty(child));
+  const parentWasClean = !mightBeDirty(parent);
+
+  if (! parent.dirtyChildren) {
+    parent.dirtyChildren = emptySetPool.pop() || new Set;
+
+  } else if (parent.dirtyChildren.has(child)) {
+    // If we already know this child is dirty, then we must have already
+    // informed our own parents that we are dirty, so we can terminate
+    // the recursion early.
+    return;
+  }
+
+  parent.dirtyChildren.add(child);
+
+  // If parent was clean before, it just became (possibly) dirty (according to
+  // mightBeDirty), since we just added child to parent.dirtyChildren.
+  if (parentWasClean) {
+    reportDirty(parent);
+  }
+}
+
+// Let a parent Entry know that one of its children is no longer dirty.
+function reportCleanChild(parent: AnyEntry, child: AnyEntry) {
+  // Must have called rememberChild(child) before calling
+  // reportCleanChild(parent, child).
+  assert(parent.childValues.has(child));
+  assert(! mightBeDirty(child));
+
+  const childValue = parent.childValues.get(child)!;
+  if (childValue.length === 0) {
+    parent.childValues.set(child, valueCopy(child.value));
+  } else if (! valueIs(childValue, child.value)) {
+    parent.setDirty();
+  }
+
+  removeDirtyChild(parent, child);
+
+  if (mightBeDirty(parent)) {
+    return;
+  }
+
+  reportClean(parent);
+}
+
+function removeDirtyChild(parent: AnyEntry, child: AnyEntry) {
+  const dc = parent.dirtyChildren;
+  if (dc) {
+    dc.delete(child);
+    if (dc.size === 0) {
+      if (emptySetPool.length < POOL_TARGET_SIZE) {
+        emptySetPool.push(dc);
+      }
+      parent.dirtyChildren = null;
+    }
+  }
+}
+
+// Removes all children from this entry and returns an array of the
+// removed children.
+function forgetChildren(parent: AnyEntry) {
+  if (parent.childValues.size > 0) {
+    parent.childValues.forEach((_value, child) => {
+      forgetChild(parent, child);
+    });
+  }
+
+  // Remove this parent Entry from any sets to which it was added by the
+  // addToSet method.
+  parent.forgetDeps();
+
+  // After we forget all our children, this.dirtyChildren must be empty
+  // and therefore must have been reset to null.
+  assert(parent.dirtyChildren === null);
+}
+
+function forgetChild(parent: AnyEntry, child: AnyEntry) {
+  child.parents.delete(parent);
+  parent.childValues.delete(child);
+  removeDirtyChild(parent, child);
+}
+
+function maybeSubscribe(entry: AnyEntry, args: any[]) {
+  if (typeof entry.subscribe === "function") {
+    try {
+      maybeUnsubscribe(entry); // Prevent double subscriptions.
+      entry.unsubscribe = entry.subscribe.apply(null, args);
+    } catch (e) {
+      // If this Entry has a subscribe function and it threw an exception
+      // (or an unsubscribe function it previously returned now throws),
+      // return false to indicate that we were not able to subscribe (or
+      // unsubscribe), and this Entry should remain dirty.
+      entry.setDirty();
+      return false;
+    }
+  }
+
+  // Returning true indicates either that there was no entry.subscribe
+  // function or that it succeeded.
+  return true;
+}

node_modules/optimism/src/helpers.ts

@@ -0,0 +1,25 @@
+export type NoInfer<T> = [T][T extends any ? 0 : never];
+
+export const {
+  hasOwnProperty,
+} = Object.prototype;
+
+export const arrayFromSet: <T>(set: Set<T>) => T[] =
+  Array.from ||
+  function (set) {
+    const array: any[] = [];
+    set.forEach(item => array.push(item));
+    return array;
+  };
+
+export type Unsubscribable = {
+  unsubscribe?: void | (() => any);
+}
+
+export function maybeUnsubscribe(entryOrDep: Unsubscribable) {
+  const { unsubscribe } = entryOrDep;
+  if (typeof unsubscribe === "function") {
+    entryOrDep.unsubscribe = void 0;
+    unsubscribe();
+  }
+}

node_modules/optimism/src/index.ts

@@ -0,0 +1,246 @@
+import { Trie } from "@wry/trie";
+
+import { StrongCache, CommonCache } from "@wry/caches";
+import { Entry, AnyEntry } from "./entry.js";
+import { parentEntrySlot } from "./context.js";
+import type { NoInfer } from "./helpers.js";
+
+// These helper functions are important for making optimism work with
+// asynchronous code. In order to register parent-child dependencies,
+// optimism needs to know about any currently active parent computations.
+// In ordinary synchronous code, the parent context is implicit in the
+// execution stack, but asynchronous code requires some extra guidance in
+// order to propagate context from one async task segment to the next.
+export {
+  bindContext,
+  noContext,
+  nonReactive,
+  setTimeout,
+  asyncFromGen,
+  Slot,
+} from "./context.js";
+
+// A lighter-weight dependency, similar to OptimisticWrapperFunction, except
+// with only one argument, no makeCacheKey, no wrapped function to recompute,
+// and no result value. Useful for representing dependency leaves in the graph
+// of computation. Subscriptions are supported.
+export { dep, OptimisticDependencyFunction } from "./dep.js";
+
+// The defaultMakeCacheKey function is remarkably powerful, because it gives
+// a unique object for any shallow-identical list of arguments. If you need
+// to implement a custom makeCacheKey function, you may find it helpful to
+// delegate the final work to defaultMakeCacheKey, which is why we export it
+// here. However, you may want to avoid defaultMakeCacheKey if your runtime
+// does not support WeakMap, or you have the ability to return a string key.
+// In those cases, just write your own custom makeCacheKey functions.
+let defaultKeyTrie: Trie<object> | undefined;
+export function defaultMakeCacheKey(...args: any[]): object {
+  const trie = defaultKeyTrie || (
+    defaultKeyTrie = new Trie(typeof WeakMap === "function")
+  );
+  return trie.lookupArray(args);
+}
+
+// If you're paranoid about memory leaks, or you want to avoid using WeakMap
+// under the hood, but you still need the behavior of defaultMakeCacheKey,
+// import this constructor to create your own tries.
+export { Trie as KeyTrie }
+
+export type OptimisticWrapperFunction<
+  TArgs extends any[],
+  TResult,
+  TKeyArgs extends any[] = TArgs,
+  TCacheKey = any,
+> = ((...args: TArgs) => TResult) & {
+  // Get the current number of Entry objects in the LRU cache.
+  readonly size: number;
+
+  // Snapshot of wrap options used to create this wrapper function.
+  options: OptionsWithCacheInstance<TArgs, TKeyArgs, TCacheKey>;
+
+  // "Dirty" any cached Entry stored for the given arguments, marking that Entry
+  // and its ancestors as potentially needing to be recomputed. The .dirty(...)
+  // method of an optimistic function takes the same parameter types as the
+  // original function by default, unless a keyArgs function is configured, and
+  // then it matters that .dirty takes TKeyArgs instead of TArgs.
+  dirty: (...args: TKeyArgs) => void;
+  // A version of .dirty that accepts a key returned by .getKey.
+  dirtyKey: (key: TCacheKey | undefined) => void;
+
+  // Examine the current value without recomputing it.
+  peek: (...args: TKeyArgs) => TResult | undefined;
+  // A version of .peek that accepts a key returned by .getKey.
+  peekKey: (key: TCacheKey | undefined) => TResult | undefined;
+
+  // Completely remove the entry from the cache, dirtying any parent entries.
+  forget: (...args: TKeyArgs) => boolean;
+  // A version of .forget that accepts a key returned by .getKey.
+  forgetKey: (key: TCacheKey | undefined) => boolean;
+
+  // In order to use the -Key version of the above functions, you need a key
+  // rather than the arguments used to compute the key. These two functions take
+  // TArgs or TKeyArgs and return the corresponding TCacheKey. If no keyArgs
+  // function has been configured, TArgs will be the same as TKeyArgs, and thus
+  // getKey and makeCacheKey will be synonymous.
+  getKey: (...args: TArgs) => TCacheKey | undefined;
+
+  // This property is equivalent to the makeCacheKey function provided in the
+  // OptimisticWrapOptions, or (if no options.makeCacheKey function is provided)
+  // a default implementation of makeCacheKey. This function is also exposed as
+  // optimistic.options.makeCacheKey, somewhat redundantly.
+  makeCacheKey: (...args: TKeyArgs) => TCacheKey | undefined;
+};
+
+export { CommonCache }
+export interface CommonCacheConstructor<TCacheKey, TResult, TArgs extends any[]> extends Function {
+  new <K extends TCacheKey, V extends Entry<TArgs, TResult>>(max?: number, dispose?: (value: V, key?: K) => void): CommonCache<K,V>;
+}
+
+export type OptimisticWrapOptions<
+  TArgs extends any[],
+  TKeyArgs extends any[] = TArgs,
+  TCacheKey = any,
+  TResult = any,
+> = {
+  // The maximum number of cache entries that should be retained before the
+  // cache begins evicting the oldest ones.
+  max?: number;
+  // Transform the raw arguments to some other type of array, which will then
+  // be passed to makeCacheKey.
+  keyArgs?: (...args: TArgs) => TKeyArgs;
+  // The makeCacheKey function takes the same arguments that were passed to
+  // the wrapper function and returns a single value that can be used as a key
+  // in a Map to identify the cached result.
+  makeCacheKey?: (...args: NoInfer<TKeyArgs>) => TCacheKey | undefined;
+  // Called when a new value is computed to allow efficient normalization of
+  // results over time, for example by returning older if equal(newer, older).
+  normalizeResult?: (newer: TResult, older: TResult) => TResult;
+  // If provided, the subscribe function should either return an unsubscribe
+  // function or return nothing.
+  subscribe?: (...args: TArgs) => void | (() => any);
+  cache?: CommonCache<NoInfer<TCacheKey>, Entry<NoInfer<TArgs>, NoInfer<TResult>>>
+    | CommonCacheConstructor<NoInfer<TCacheKey>, NoInfer<TResult>, NoInfer<TArgs>>;
+};
+
+export interface OptionsWithCacheInstance<
+  TArgs extends any[],
+  TKeyArgs extends any[] = TArgs,
+  TCacheKey = any,
+  TResult = any,
+> extends OptimisticWrapOptions<TArgs, TKeyArgs, TCacheKey, TResult> {
+  cache: CommonCache<NoInfer<TCacheKey>, Entry<NoInfer<TArgs>, NoInfer<TResult>>>;
+};
+
+const caches = new Set<CommonCache<any, AnyEntry>>();
+
+export function wrap<
+  TArgs extends any[],
+  TResult,
+  TKeyArgs extends any[] = TArgs,
+  TCacheKey = any,
+>(originalFunction: (...args: TArgs) => TResult, {
+  max = Math.pow(2, 16),
+  keyArgs,
+  makeCacheKey = (defaultMakeCacheKey as () => TCacheKey),
+  normalizeResult,
+  subscribe,
+  cache: cacheOption = StrongCache,
+}: OptimisticWrapOptions<TArgs, TKeyArgs, TCacheKey, TResult> = Object.create(null)) {
+  const cache: CommonCache<TCacheKey, Entry<TArgs, TResult>> =
+    typeof cacheOption === "function"
+      ? new cacheOption(max, entry => entry.dispose())
+      : cacheOption;
+
+  const optimistic = function (): TResult {
+    const key = makeCacheKey.apply(
+      null,
+      keyArgs ? keyArgs.apply(null, arguments as any) : arguments as any
+    );
+
+    if (key === void 0) {
+      return originalFunction.apply(null, arguments as any);
+    }
+
+    let entry = cache.get(key)!;
+    if (!entry) {
+      cache.set(key, entry = new Entry(originalFunction));
+      entry.normalizeResult = normalizeResult;
+      entry.subscribe = subscribe;
+      // Give the Entry the ability to trigger cache.delete(key), even though
+      // the Entry itself does not know about key or cache.
+      entry.forget = () => cache.delete(key);
+    }
+
+    const value = entry.recompute(
+      Array.prototype.slice.call(arguments) as TArgs,
+    );
+
+    // Move this entry to the front of the least-recently used queue,
+    // since we just finished computing its value.
+    cache.set(key, entry);
+
+    caches.add(cache);
+
+    // Clean up any excess entries in the cache, but only if there is no
+    // active parent entry, meaning we're not in the middle of a larger
+    // computation that might be flummoxed by the cleaning.
+    if (! parentEntrySlot.hasValue()) {
+      caches.forEach(cache => cache.clean());
+      caches.clear();
+    }
+
+    return value;
+  } as OptimisticWrapperFunction<TArgs, TResult, TKeyArgs, TCacheKey>;
+
+  Object.defineProperty(optimistic, "size", {
+    get: () => cache.size,
+    configurable: false,
+    enumerable: false,
+  });
+
+  Object.freeze(optimistic.options = {
+    max,
+    keyArgs,
+    makeCacheKey,
+    normalizeResult,
+    subscribe,
+    cache,
+  });
+
+  function dirtyKey(key: TCacheKey | undefined) {
+    const entry = key && cache.get(key);
+    if (entry) {
+      entry.setDirty();
+    }
+  }
+  optimistic.dirtyKey = dirtyKey;
+  optimistic.dirty = function dirty() {
+    dirtyKey(makeCacheKey.apply(null, arguments as any));
+  };
+
+  function peekKey(key: TCacheKey | undefined) {
+    const entry = key && cache.get(key);
+    if (entry) {
+      return entry.peek();
+    }
+  }
+  optimistic.peekKey = peekKey;
+  optimistic.peek = function peek() {
+    return peekKey(makeCacheKey.apply(null, arguments as any));
+  };
+
+  function forgetKey(key: TCacheKey | undefined) {
+    return key ? cache.delete(key) : false;
+  }
+  optimistic.forgetKey = forgetKey;
+  optimistic.forget = function forget() {
+    return forgetKey(makeCacheKey.apply(null, arguments as any));
+  };
+
+  optimistic.makeCacheKey = makeCacheKey;
+  optimistic.getKey = keyArgs ? function getKey() {
+    return makeCacheKey.apply(null, keyArgs.apply(null, arguments as any));
+  } : makeCacheKey as (...args: any[]) => TCacheKey | undefined;
+
+  return Object.freeze(optimistic);
+}

node_modules/optimism/src/tests/api.ts

@@ -0,0 +1,968 @@
+import * as assert from "assert";
+import { createHash } from "crypto";
+import {
+  wrap,
+  defaultMakeCacheKey,
+  OptimisticWrapperFunction,
+  CommonCache,
+} from "../index";
+import { equal } from '@wry/equality';
+import { wrapYieldingFiberMethods } from '@wry/context';
+import { dep } from "../dep";
+import { permutations } from "./test-utils";
+
+type NumThunk = OptimisticWrapperFunction<[], number>;
+
+describe("optimism", function () {
+  it("sanity", function () {
+    assert.strictEqual(typeof wrap, "function");
+    assert.strictEqual(typeof defaultMakeCacheKey, "function");
+  });
+
+  it("works with single functions", function () {
+    const test = wrap(function (x: string) {
+      return x + salt;
+    }, {
+      makeCacheKey: function (x: string) {
+        return x;
+      }
+    });
+
+    let salt = "salt";
+    assert.strictEqual(test("a"), "asalt");
+
+    salt = "NaCl";
+    assert.strictEqual(test("a"), "asalt");
+    assert.strictEqual(test("b"), "bNaCl");
+
+    test.dirty("a");
+    assert.strictEqual(test("a"), "aNaCl");
+  });
+
+  it("can manually specify a cache instance", () => {
+    class Cache<K, V> implements CommonCache<K, V> {
+      private _cache = new Map<K, V>()
+      has = this._cache.has.bind(this._cache);
+      get = this._cache.get.bind(this._cache);
+      delete = this._cache.delete.bind(this._cache);
+      get size(){ return this._cache.size }
+      set(key: K, value: V): V {
+        this._cache.set(key, value);
+        return value;
+      }
+      clean(){};
+    }
+
+    const cache = new Cache<String, any>();
+
+    const wrapped = wrap(
+      (obj: { value: string }) => obj.value + " transformed",
+      {
+        cache,
+        makeCacheKey(obj) {
+          return obj.value;
+        },
+      }
+    );
+    assert.ok(cache instanceof Cache);
+    assert.strictEqual(wrapped({ value: "test" }), "test transformed");
+    assert.strictEqual(wrapped({ value: "test" }), "test transformed");
+    cache.get("test").value[0] = "test modified";
+    assert.strictEqual(wrapped({ value: "test" }), "test modified");
+  });
+
+  it("can manually specify a cache constructor", () => {
+    class Cache<K, V> implements CommonCache<K, V> {
+      private _cache = new Map<K, V>()
+      has = this._cache.has.bind(this._cache);
+      get = this._cache.get.bind(this._cache);
+      delete = this._cache.delete.bind(this._cache);
+      get size(){ return this._cache.size }
+      set(key: K, value: V): V {
+        this._cache.set(key, value);
+        return value;
+      }
+      clean(){};
+    }
+
+    const wrapped = wrap(
+      (obj: { value: string }) => obj.value + " transformed",
+      {
+        cache: Cache,
+        makeCacheKey(obj) {
+          return obj.value;
+        },
+      }
+    );
+    assert.ok(wrapped.options.cache instanceof Cache);
+    assert.strictEqual(wrapped({ value: "test" }), "test transformed");
+    assert.strictEqual(wrapped({ value: "test" }), "test transformed");
+    wrapped.options.cache.get("test").value[0] = "test modified";
+    assert.strictEqual(wrapped({ value: "test" }), "test modified");
+  });
+
+  it("works with two layers of functions", function () {
+    const files: { [key: string]: string } = {
+      "a.js": "a",
+      "b.js": "b"
+    };
+
+    const fileNames = Object.keys(files);
+
+    const read = wrap(function (path: string) {
+      return files[path];
+    });
+
+    const hash = wrap(function (paths: string[]) {
+      const h = createHash("sha1");
+      paths.forEach(function (path) {
+        h.update(read(path));
+      });
+      return h.digest("hex");
+    });
+
+    const hash1 = hash(fileNames);
+    files["a.js"] += "yy";
+    const hash2 = hash(fileNames);
+    read.dirty("a.js");
+    const hash3 = hash(fileNames);
+    files["b.js"] += "ee";
+    read.dirty("b.js");
+    const hash4 = hash(fileNames);
+
+    assert.strictEqual(hash1, hash2);
+    assert.notStrictEqual(hash1, hash3);
+    assert.notStrictEqual(hash1, hash4);
+    assert.notStrictEqual(hash3, hash4);
+  });
+
+  it("works with subscription functions", function () {
+    let dirty: () => void;
+    let sep = ",";
+    const unsubscribed = Object.create(null);
+    const test = wrap(function (x: string) {
+      return [x, x, x].join(sep);
+    }, {
+      max: 1,
+      subscribe: function (x: string) {
+        dirty = function () {
+          test.dirty(x);
+        };
+
+        delete unsubscribed[x];
+
+        return function () {
+          unsubscribed[x] = true;
+        };
+      }
+    });
+
+    assert.strictEqual(test("a"), "a,a,a");
+
+    assert.strictEqual(test("b"), "b,b,b");
+    assert.deepEqual(unsubscribed, { a: true });
+
+    assert.strictEqual(test("c"), "c,c,c");
+    assert.deepEqual(unsubscribed, {
+      a: true,
+      b: true
+    });
+
+    sep = ":";
+
+    assert.strictEqual(test("c"), "c,c,c");
+    assert.deepEqual(unsubscribed, {
+      a: true,
+      b: true
+    });
+
+    dirty!();
+
+    assert.strictEqual(test("c"), "c:c:c");
+    assert.deepEqual(unsubscribed, {
+      a: true,
+      b: true
+    });
+
+    assert.strictEqual(test("d"), "d:d:d");
+    assert.deepEqual(unsubscribed, {
+      a: true,
+      b: true,
+      c: true
+    });
+  });
+
+  // The fibers coroutine library no longer works with Node.js v16.
+  it.skip("is not confused by fibers", function () {
+    const Fiber = wrapYieldingFiberMethods(require("fibers"));
+
+    const order = [];
+    let result1 = "one";
+    let result2 = "two";
+
+    const f1 = new Fiber(function () {
+      order.push(1);
+
+      const o1 = wrap(function () {
+        Fiber.yield();
+        return result1;
+      });
+
+      order.push(2);
+      assert.strictEqual(o1(), "one");
+      order.push(3);
+      result1 += ":dirty";
+      assert.strictEqual(o1(), "one");
+      order.push(4);
+      Fiber.yield();
+      order.push(5);
+      assert.strictEqual(o1(), "one");
+      order.push(6);
+      o1.dirty();
+      order.push(7);
+      assert.strictEqual(o1(), "one:dirty");
+      order.push(8);
+      assert.strictEqual(o2(), "two:dirty");
+      order.push(9);
+    });
+
+    result2 = "two"
+    const o2 = wrap(function () {
+      return result2;
+    });
+
+    order.push(0);
+
+    f1.run();
+    assert.deepEqual(order, [0, 1, 2]);
+
+    // The primary goal of this test is to make sure this call to o2()
+    // does not register a dirty-chain dependency for o1.
+    assert.strictEqual(o2(), "two");
+
+    f1.run();
+    assert.deepEqual(order, [0, 1, 2, 3, 4]);
+
+    // If the call to o2() captured o1() as a parent, then this o2.dirty()
+    // call will report the o1() call dirty, which is not what we want.
+    result2 += ":dirty";
+    o2.dirty();
+
+    f1.run();
+    // The call to o1() between order.push(5) and order.push(6) should not
+    // yield, because it should still be cached, because it should not be
+    // dirty. However, the call to o1() between order.push(7) and
+    // order.push(8) should yield, because we call o1.dirty() explicitly,
+    // which is why this assertion stops at 7.
+    assert.deepEqual(order, [0, 1, 2, 3, 4, 5, 6, 7]);
+
+    f1.run();
+    assert.deepEqual(order, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
+  });
+
+  it("marks evicted cache entries dirty", function () {
+    let childSalt = "*";
+    let child = wrap(function (x: string) {
+      return x + childSalt;
+    }, { max: 1 });
+
+    let parentSalt = "^";
+    const parent = wrap(function (x: string) {
+      return child(x) + parentSalt;
+    });
+
+    assert.strictEqual(parent("asdf"), "asdf*^");
+
+    childSalt = "&";
+    parentSalt = "%";
+
+    assert.strictEqual(parent("asdf"), "asdf*^");
+    assert.strictEqual(child("zxcv"), "zxcv&");
+    assert.strictEqual(parent("asdf"), "asdf&%");
+  });
+
+  it("handles children throwing exceptions", function () {
+    const expected = new Error("oyez");
+
+    const child = wrap(function () {
+      throw expected;
+    });
+
+    const parent = wrap(function () {
+      try {
+        child();
+      } catch (e) {
+        return e;
+      }
+    });
+
+    assert.strictEqual(parent(), expected);
+    assert.strictEqual(parent(), expected);
+
+    child.dirty();
+    assert.strictEqual(parent(), expected);
+
+    parent.dirty();
+    assert.strictEqual(parent(), expected);
+  });
+
+  it("reports clean children to correct parents", function () {
+    let childResult = "a";
+    const child = wrap(function () {
+      return childResult;
+    });
+
+    const parent = wrap(function (x: any) {
+      return child() + x;
+    });
+
+    assert.strictEqual(parent(1), "a1");
+    assert.strictEqual(parent(2), "a2");
+
+    childResult = "b";
+    child.dirty();
+
+    // If this call to parent(1) mistakenly reports child() as clean to
+    // parent(2), then the second assertion will fail by returning "a2".
+    assert.strictEqual(parent(1), "b1");
+    assert.strictEqual(parent(2), "b2");
+  });
+
+  it("supports object cache keys", function () {
+    let counter = 0;
+    const wrapped = wrap(function (a: any, b: any) {
+      return counter++;
+    });
+
+    const a = {};
+    const b = {};
+
+    // Different combinations of distinct object references should
+    // increment the counter.
+    assert.strictEqual(wrapped(a, a), 0);
+    assert.strictEqual(wrapped(a, b), 1);
+    assert.strictEqual(wrapped(b, a), 2);
+    assert.strictEqual(wrapped(b, b), 3);
+
+    // But the same combinations of arguments should return the same
+    // cached values when passed again.
+    assert.strictEqual(wrapped(a, a), 0);
+    assert.strictEqual(wrapped(a, b), 1);
+    assert.strictEqual(wrapped(b, a), 2);
+    assert.strictEqual(wrapped(b, b), 3);
+  });
+
+  it("supports falsy non-void cache keys", function () {
+    let callCount = 0;
+    const wrapped = wrap((key: number | string | null | boolean | undefined) => {
+      ++callCount;
+      return key;
+    }, {
+      makeCacheKey(key) {
+        return key;
+      },
+    });
+
+    assert.strictEqual(wrapped(0), 0);
+    assert.strictEqual(callCount, 1);
+    assert.strictEqual(wrapped(0), 0);
+    assert.strictEqual(callCount, 1);
+
+    assert.strictEqual(wrapped(""), "");
+    assert.strictEqual(callCount, 2);
+    assert.strictEqual(wrapped(""), "");
+    assert.strictEqual(callCount, 2);
+
+    assert.strictEqual(wrapped(null), null);
+    assert.strictEqual(callCount, 3);
+    assert.strictEqual(wrapped(null), null);
+    assert.strictEqual(callCount, 3);
+
+    assert.strictEqual(wrapped(false), false);
+    assert.strictEqual(callCount, 4);
+    assert.strictEqual(wrapped(false), false);
+    assert.strictEqual(callCount, 4);
+
+    assert.strictEqual(wrapped(0), 0);
+    assert.strictEqual(wrapped(""), "");
+    assert.strictEqual(wrapped(null), null);
+    assert.strictEqual(wrapped(false), false);
+    assert.strictEqual(callCount, 4);
+
+    assert.strictEqual(wrapped(1), 1);
+    assert.strictEqual(wrapped("oyez"), "oyez");
+    assert.strictEqual(wrapped(true), true);
+    assert.strictEqual(callCount, 7);
+
+    assert.strictEqual(wrapped(void 0), void 0);
+    assert.strictEqual(wrapped(void 0), void 0);
+    assert.strictEqual(wrapped(void 0), void 0);
+    assert.strictEqual(callCount, 10);
+  });
+
+  it("detects problematic cycles", function () {
+    const self: NumThunk = wrap(function () {
+      return self() + 1;
+    });
+
+    const mutualA: NumThunk = wrap(function () {
+      return mutualB() + 1;
+    });
+
+    const mutualB: NumThunk = wrap(function () {
+      return mutualA() + 1;
+    });
+
+    function check(fn: typeof self) {
+      try {
+        fn();
+        throw new Error("should not get here");
+      } catch (e: any) {
+        assert.strictEqual(e.message, "already recomputing");
+      }
+
+      // Try dirtying the function, now that there's a cycle in the Entry
+      // graph. This should succeed.
+      fn.dirty();
+    }
+
+    check(self);
+    check(mutualA);
+    check(mutualB);
+
+    let returnZero = true;
+    const fn: NumThunk = wrap(function () {
+      if (returnZero) {
+        returnZero = false;
+        return 0;
+      }
+      returnZero = true;
+      return fn() + 1;
+    });
+
+    assert.strictEqual(fn(), 0);
+    assert.strictEqual(returnZero, false);
+
+    returnZero = true;
+    assert.strictEqual(fn(), 0);
+    assert.strictEqual(returnZero, true);
+
+    fn.dirty();
+
+    returnZero = false;
+    check(fn);
+  });
+
+  it("tolerates misbehaving makeCacheKey functions", function () {
+    type NumNum = OptimisticWrapperFunction<[number], number>;
+
+    let chaos = false;
+    let counter = 0;
+    const allOddsDep = wrap(() => ++counter);
+
+    const sumOdd: NumNum = wrap((n: number) => {
+      allOddsDep();
+      if (n < 1) return 0;
+      if (n % 2 === 1) {
+        return n + sumEven(n - 1);
+      }
+      return sumEven(n);
+    }, {
+      makeCacheKey(n) {
+        // Even though the computation completes, returning "constant" causes
+        // cycles in the Entry graph.
+        return chaos ? "constant" : n;
+      }
+    });
+
+    const sumEven: NumNum = wrap((n: number) => {
+      if (n < 1) return 0;
+      if (n % 2 === 0) {
+        return n + sumOdd(n - 1);
+      }
+      return sumOdd(n);
+    });
+
+    function check() {
+      sumEven.dirty(10);
+      sumOdd.dirty(10);
+      if (chaos) {
+        try {
+          sumOdd(10);
+        } catch (e: any) {
+          assert.strictEqual(e.message, "already recomputing");
+        }
+        try {
+          sumEven(10);
+        } catch (e: any) {
+          assert.strictEqual(e.message, "already recomputing");
+        }
+      } else {
+        assert.strictEqual(sumEven(10), 55);
+        assert.strictEqual(sumOdd(10), 55);
+      }
+    }
+
+    check();
+
+    allOddsDep.dirty();
+    sumEven.dirty(10);
+    check();
+
+    allOddsDep.dirty();
+    allOddsDep();
+    check();
+
+    chaos = true;
+    check();
+
+    allOddsDep.dirty();
+    allOddsDep();
+    check();
+
+    allOddsDep.dirty();
+    check();
+
+    chaos = false;
+    allOddsDep.dirty();
+    check();
+
+    chaos = true;
+    sumOdd.dirty(9);
+    sumOdd.dirty(7);
+    sumOdd.dirty(5);
+    check();
+
+    chaos = false;
+    check();
+  });
+
+  it("supports options.keyArgs", function () {
+    const sumNums = wrap((...args: any[]) => ({
+      sum: args.reduce(
+        (sum, arg) => typeof arg === "number" ? arg + sum : sum,
+        0,
+      ) as number,
+    }), {
+      keyArgs(...args) {
+        return args.filter(arg => typeof arg === "number");
+      },
+    });
+
+    assert.strictEqual(sumNums().sum, 0);
+    assert.strictEqual(sumNums("asdf", true, sumNums).sum, 0);
+
+    const sumObj1 = sumNums(1, "zxcv", true, 2, false, 3);
+    assert.strictEqual(sumObj1.sum, 6);
+    // These results are === sumObj1 because the numbers involved are identical.
+    assert.strictEqual(sumNums(1, 2, 3), sumObj1);
+    assert.strictEqual(sumNums("qwer", 1, 2, true, 3, [3]), sumObj1);
+    assert.strictEqual(sumNums("backwards", 3, 2, 1).sum, 6);
+    assert.notStrictEqual(sumNums("backwards", 3, 2, 1), sumObj1);
+
+    sumNums.dirty(1, 2, 3);
+    const sumObj2 = sumNums(1, 2, 3);
+    assert.strictEqual(sumObj2.sum, 6);
+    assert.notStrictEqual(sumObj2, sumObj1);
+    assert.strictEqual(sumNums("a", 1, "b", 2, "c", 3), sumObj2);
+  });
+
+  it("supports wrap(fn, {...}).options to reflect input options", function () {
+    const keyArgs: () => [] = () => [];
+    function makeCacheKey() { return "constant"; }
+    function subscribe() {}
+    let normalizeCalls: [number, number][] = [];
+    function normalizeResult(newer: number, older: number) {
+      normalizeCalls.push([newer, older]);
+      return newer;
+    }
+
+    let counter1 = 0;
+    const wrapped = wrap(() => ++counter1, {
+      max: 10,
+      keyArgs,
+      makeCacheKey,
+      normalizeResult,
+      subscribe,
+    });
+    assert.strictEqual(wrapped.options.max, 10);
+    assert.strictEqual(wrapped.options.keyArgs, keyArgs);
+    assert.strictEqual(wrapped.options.makeCacheKey, makeCacheKey);
+    assert.strictEqual(wrapped.options.normalizeResult, normalizeResult);
+    assert.strictEqual(wrapped.options.subscribe, subscribe);
+
+    assert.deepEqual(normalizeCalls, []);
+    assert.strictEqual(wrapped(), 1);
+    assert.deepEqual(normalizeCalls, []);
+    assert.strictEqual(wrapped(), 1);
+    assert.deepEqual(normalizeCalls, []);
+    wrapped.dirty();
+    assert.deepEqual(normalizeCalls, []);
+    assert.strictEqual(wrapped(), 2);
+    assert.deepEqual(normalizeCalls, [[2, 1]]);
+    assert.strictEqual(wrapped(), 2);
+    wrapped.dirty();
+    assert.strictEqual(wrapped(), 3);
+    assert.deepEqual(normalizeCalls, [[2, 1], [3, 2]]);
+    assert.strictEqual(wrapped(), 3);
+    assert.deepEqual(normalizeCalls, [[2, 1], [3, 2]]);
+    assert.strictEqual(wrapped(), 3);
+
+    let counter2 = 0;
+    const wrappedWithDefaults = wrap(() => ++counter2);
+    assert.strictEqual(wrappedWithDefaults.options.max, Math.pow(2, 16));
+    assert.strictEqual(wrappedWithDefaults.options.keyArgs, void 0);
+    assert.strictEqual(typeof wrappedWithDefaults.options.makeCacheKey, "function");
+    assert.strictEqual(wrappedWithDefaults.options.normalizeResult, void 0);
+    assert.strictEqual(wrappedWithDefaults.options.subscribe, void 0);
+  });
+
+  it("tolerates cycles when propagating dirty/clean signals", function () {
+    let counter = 0;
+    const dep = wrap(() => ++counter);
+
+    const callChild = () => child();
+    let parentBody = callChild;
+    const parent = wrap(() => {
+      dep();
+      return parentBody();
+    });
+
+    const callParent = () => parent();
+    let childBody = () => "child";
+    const child = wrap(() => {
+      dep();
+      return childBody();
+    });
+
+    assert.strictEqual(parent(), "child");
+
+    childBody = callParent;
+    parentBody = () => "parent";
+    child.dirty();
+    assert.strictEqual(child(), "parent");
+    dep.dirty();
+    assert.strictEqual(child(), "parent");
+  });
+
+  it("is not confused by eviction during recomputation", function () {
+    const fib: OptimisticWrapperFunction<[number], number> =
+      wrap(function (n: number) {
+        if (n > 1) {
+          return fib(n - 1) + fib(n - 2);
+        }
+        return n;
+      }, {
+        max: 10
+      });
+
+    assert.strictEqual(fib.options.max, 10);
+
+    assert.strictEqual(fib(78), 8944394323791464);
+    assert.strictEqual(fib(68), 72723460248141);
+    assert.strictEqual(fib(58), 591286729879);
+    assert.strictEqual(fib(48), 4807526976);
+    assert.strictEqual(fib(38), 39088169);
+    assert.strictEqual(fib(28), 317811);
+    assert.strictEqual(fib(18), 2584);
+    assert.strictEqual(fib(8),  21);
+  });
+
+  it("allows peeking the current value", function () {
+    const sumFirst = wrap(function (n: number): number {
+      return n < 1 ? 0 : n + sumFirst(n - 1);
+    });
+
+    assert.strictEqual(sumFirst.peek(3), void 0);
+    assert.strictEqual(sumFirst.peek(2), void 0);
+    assert.strictEqual(sumFirst.peek(1), void 0);
+    assert.strictEqual(sumFirst.peek(0), void 0);
+    assert.strictEqual(sumFirst(3), 6);
+    assert.strictEqual(sumFirst.peek(3), 6);
+    assert.strictEqual(sumFirst.peek(2), 3);
+    assert.strictEqual(sumFirst.peek(1), 1);
+    assert.strictEqual(sumFirst.peek(0), 0);
+
+    assert.strictEqual(sumFirst.peek(7), void 0);
+    assert.strictEqual(sumFirst(10), 55);
+    assert.strictEqual(sumFirst.peek(9), 55 - 10);
+    assert.strictEqual(sumFirst.peek(8), 55 - 10 - 9);
+    assert.strictEqual(sumFirst.peek(7), 55 - 10 - 9 - 8);
+
+    sumFirst.dirty(7);
+    // Everything from 7 and above is now unpeekable.
+    assert.strictEqual(sumFirst.peek(10), void 0);
+    assert.strictEqual(sumFirst.peek(9), void 0);
+    assert.strictEqual(sumFirst.peek(8), void 0);
+    assert.strictEqual(sumFirst.peek(7), void 0);
+    // Since 6 < 7, its value is still cached.
+    assert.strictEqual(sumFirst.peek(6), 6 * 7 / 2);
+  });
+
+  it("allows forgetting entries", function () {
+    const ns: number[] = [];
+    const sumFirst = wrap(function (n: number): number {
+      ns.push(n);
+      return n < 1 ? 0 : n + sumFirst(n - 1);
+    });
+
+    function inclusiveDescendingRange(n: number, limit = 0) {
+      const range: number[] = [];
+      while (n >= limit) range.push(n--);
+      return range;
+    }
+
+    assert.strictEqual(sumFirst(10), 55);
+    assert.deepStrictEqual(ns, inclusiveDescendingRange(10));
+
+    assert.strictEqual(sumFirst.forget(6), true);
+    assert.strictEqual(sumFirst(4), 10);
+    assert.deepStrictEqual(ns, inclusiveDescendingRange(10));
+
+    assert.strictEqual(sumFirst(11), 66);
+    assert.deepStrictEqual(ns, [
+      ...inclusiveDescendingRange(10),
+      ...inclusiveDescendingRange(11, 6),
+    ]);
+
+    assert.strictEqual(sumFirst.forget(3), true);
+    assert.strictEqual(sumFirst(7), 28);
+    assert.deepStrictEqual(ns, [
+      ...inclusiveDescendingRange(10),
+      ...inclusiveDescendingRange(11, 6),
+      ...inclusiveDescendingRange(7, 3),
+    ]);
+
+    assert.strictEqual(sumFirst.forget(123), false);
+    assert.strictEqual(sumFirst.forget(-1), false);
+    assert.strictEqual(sumFirst.forget("7" as any), false);
+    assert.strictEqual((sumFirst.forget as any)(6, 4), false);
+  });
+
+  it("allows forgetting entries by key", function () {
+    const ns: number[] = [];
+    const sumFirst = wrap(function (n: number): number {
+      ns.push(n);
+      return n < 1 ? 0 : n + sumFirst(n - 1);
+    }, {
+        makeCacheKey: function (x: number) {
+          return x * 2;
+        }
+    });
+
+    assert.strictEqual(sumFirst.options.makeCacheKey!(7), 14);
+    assert.strictEqual(sumFirst(10), 55);
+
+    /*
+     * Verify:
+     * 1- Calling forgetKey will remove the entry.
+     * 2- Calling forgetKey again will return false.
+     * 3- Callling forget on the same entry will return false.
+     */
+    assert.strictEqual(sumFirst.forgetKey(6 * 2), true);
+    assert.strictEqual(sumFirst.forgetKey(6 * 2), false);
+    assert.strictEqual(sumFirst.forget(6), false);
+
+    /*
+     * Verify:
+     * 1- Calling forget will remove the entry.
+     * 2- Calling forget again will return false.
+     * 3- Callling forgetKey on the same entry will return false.
+     */
+    assert.strictEqual(sumFirst.forget(7), true);
+    assert.strictEqual(sumFirst.forget(7), false);
+    assert.strictEqual(sumFirst.forgetKey(7 * 2), false);
+
+    /*
+     * Verify you can query an entry key.
+     */
+    assert.strictEqual(sumFirst.getKey(9), 18);
+    assert.strictEqual(sumFirst.forgetKey(sumFirst.getKey(9)), true);
+    assert.strictEqual(sumFirst.forgetKey(sumFirst.getKey(9)), false);
+    assert.strictEqual(sumFirst.forget(9), false);
+  });
+
+  it("exposes optimistic.{size,options.cache.size} properties", function () {
+    const d = dep<string>();
+    const fib = wrap((n: number): number => {
+      d("shared");
+      return n > 1 ? fib(n - 1) + fib(n - 2) : n;
+    }, {
+      makeCacheKey(n) {
+        return n;
+      },
+    });
+
+    function size() {
+      assert.strictEqual(fib.options.cache.size, fib.size);
+      return fib.size;
+    }
+
+    assert.strictEqual(size(), 0);
+
+    assert.strictEqual(fib(0), 0);
+    assert.strictEqual(fib(1), 1);
+    assert.strictEqual(fib(2), 1);
+    assert.strictEqual(fib(3), 2);
+    assert.strictEqual(fib(4), 3);
+    assert.strictEqual(fib(5), 5);
+    assert.strictEqual(fib(6), 8);
+    assert.strictEqual(fib(7), 13);
+    assert.strictEqual(fib(8), 21);
+
+    assert.strictEqual(size(), 9);
+
+    fib.dirty(6);
+    // Merely dirtying an Entry does not remove it from the LRU cache.
+    assert.strictEqual(size(), 9);
+
+    fib.forget(6);
+    // Forgetting an Entry both dirties it and removes it from the LRU cache.
+    assert.strictEqual(size(), 8);
+
+    fib.forget(4);
+    assert.strictEqual(size(), 7);
+
+    // This way of calling d.dirty causes any parent Entry objects to be
+    // forgotten (removed from the LRU cache).
+    d.dirty("shared", "forget");
+    assert.strictEqual(size(), 0);
+  });
+
+  describe("wrapOptions.normalizeResult", function () {
+    it("can normalize array results", function () {
+      const normalizeArgs: [number[], number[]][] = [];
+      const range = wrap((n: number) => {
+        let result = [];
+        for (let i = 0; i < n; ++i) {
+          result[i] = i;
+        }
+        return result;
+      }, {
+        normalizeResult(newer, older) {
+          normalizeArgs.push([newer, older]);
+          return equal(newer, older) ? older : newer;
+        },
+      });
+
+      const r3a = range(3);
+      assert.deepStrictEqual(r3a, [0, 1, 2]);
+      // Nothing surprising, just regular caching.
+      assert.strictEqual(r3a, range(3));
+
+      // Force range(3) to be recomputed below.
+      range.dirty(3);
+
+      const r3b = range(3);
+      assert.deepStrictEqual(r3b, [0, 1, 2]);
+
+      assert.strictEqual(r3a, r3b);
+
+      assert.deepStrictEqual(normalizeArgs, [
+        [r3b, r3a],
+      ]);
+      // Though r3a and r3b ended up ===, the normalizeResult callback should
+      // have been called with two !== arrays.
+      assert.notStrictEqual(
+        normalizeArgs[0][0],
+        normalizeArgs[0][1],
+      );
+    });
+
+    it("can normalize recursive array results", function () {
+      const range = wrap((n: number): number[] => {
+        if (n <= 0) return [];
+        return range(n - 1).concat(n - 1);
+      }, {
+        normalizeResult: (newer, older) => equal(newer, older) ? older : newer,
+      });
+
+      const ranges = [
+        range(0),
+        range(1),
+        range(2),
+        range(3),
+        range(4),
+      ];
+
+      assert.deepStrictEqual(ranges[0], []);
+      assert.deepStrictEqual(ranges[1], [0]);
+      assert.deepStrictEqual(ranges[2], [0, 1]);
+      assert.deepStrictEqual(ranges[3], [0, 1, 2]);
+      assert.deepStrictEqual(ranges[4], [0, 1, 2, 3]);
+
+      const perms = permutations(ranges[4]);
+      assert.strictEqual(perms.length, 4 * 3 * 2 * 1);
+
+      // For each permutation of the range sizes, check that strict equality
+      // holds for r[i] and range(i) for all i after dirtying each number.
+      let count = 0;
+      perms.forEach(perm => {
+        perm.forEach(toDirty => {
+          range.dirty(toDirty);
+          perm.forEach(i => {
+            assert.strictEqual(ranges[i], range(i));
+            ++count;
+          });
+        })
+      });
+      assert.strictEqual(count, perms.length * 4 * 4);
+    });
+
+    it("exceptions thrown by normalizeResult are ignored", function () {
+      const normalizeCalls: [string | number, string | number][] = [];
+
+      const maybeThrow = wrap((value: string | number, shouldThrow: boolean) => {
+        if (shouldThrow) throw value;
+        return value;
+      }, {
+        makeCacheKey(value, shouldThrow) {
+          return JSON.stringify({
+            // Coerce the value to a string so we can trigger normalizeResult
+            // using either 2 or "2" below.
+            value: String(value),
+            shouldThrow,
+          });
+        },
+        normalizeResult(a, b) {
+          normalizeCalls.push([a, b]);
+          throw new Error("from normalizeResult (expected)");
+        },
+      });
+
+      assert.strictEqual(maybeThrow(1, false), 1);
+      assert.strictEqual(maybeThrow(2, false), 2);
+
+      maybeThrow.dirty(2, false);
+      assert.strictEqual(maybeThrow("2", false), "2");
+      assert.strictEqual(maybeThrow(2, false), "2");
+      maybeThrow.dirty(2, false);
+      assert.strictEqual(maybeThrow(2, false), 2);
+      assert.strictEqual(maybeThrow("2", false), 2);
+
+      assert.throws(
+        () => maybeThrow(3, true),
+        error => error === 3,
+      );
+
+      assert.throws(
+        () => maybeThrow("3", true),
+        // Still 3 because the previous maybeThrow(3, true) exception is cached.
+        error => error === 3,
+      );
+
+      maybeThrow.dirty(3, true);
+      assert.throws(
+        () => maybeThrow("3", true),
+        error => error === "3",
+      );
+
+      // Even though the exception thrown by normalizeResult was ignored, check
+      // that it was in fact called (twice).
+      assert.deepStrictEqual(normalizeCalls, [
+        ["2", 2],
+        [2, "2"],
+      ]);
+    });
+  });
+});

node_modules/optimism/src/tests/cache.ts

@@ -0,0 +1,110 @@
+import * as assert from "assert";
+import { StrongCache as Cache } from "@wry/caches";
+
+describe("least-recently-used cache", function () {
+  it("can hold lots of elements", function () {
+    const cache = new Cache();
+    const count = 1000000;
+
+    for (let i = 0; i < count; ++i) {
+      cache.set(i, String(i));
+    }
+
+    cache.clean();
+
+    assert.strictEqual((cache as any).map.size, count);
+    assert.ok(cache.has(0));
+    assert.ok(cache.has(count - 1));
+    assert.strictEqual(cache.get(43), "43");
+  });
+
+  it("evicts excess old elements", function () {
+    const max = 10;
+    const evicted = [];
+    const cache = new Cache(max, (value, key) => {
+      assert.strictEqual(String(key), value);
+      evicted.push(key);
+    });
+
+    const count = 100;
+    const keys = [];
+    for (let i = 0; i < count; ++i) {
+      cache.set(i, String(i));
+      keys.push(i);
+    }
+
+    cache.clean();
+
+    assert.strictEqual((cache as any).map.size, max);
+    assert.strictEqual(evicted.length, count - max);
+
+    for (let i = count - max; i < count; ++i) {
+      assert.ok(cache.has(i));
+    }
+  });
+
+  it("can cope with small max values", function () {
+    const cache = new Cache(2);
+
+    function check(...sequence: number[]) {
+      cache.clean();
+
+      let entry = (cache as any).newest;
+      const forwards = [];
+      while (entry) {
+        forwards.push(entry.key);
+        entry = entry.older;
+      }
+      assert.deepEqual(forwards, sequence);
+
+      const backwards = [];
+      entry = (cache as any).oldest;
+      while (entry) {
+        backwards.push(entry.key);
+        entry = entry.newer;
+      }
+      backwards.reverse();
+      assert.deepEqual(backwards, sequence);
+
+      sequence.forEach(function (n) {
+        assert.strictEqual((cache as any).map.get(n).value, n + 1);
+      });
+
+      if (sequence.length > 0) {
+        assert.strictEqual((cache as any).newest.key, sequence[0]);
+        assert.strictEqual(
+          (cache as any).oldest.key,
+          sequence[sequence.length - 1]
+        );
+      }
+    }
+
+    cache.set(1, 2);
+    check(1);
+
+    cache.set(2, 3);
+    check(2, 1);
+
+    cache.set(3, 4);
+    check(3, 2);
+
+    cache.get(2);
+    check(2, 3);
+
+    cache.set(4, 5);
+    check(4, 2);
+
+    assert.strictEqual(cache.has(1), false);
+    assert.strictEqual(cache.get(2), 3);
+    assert.strictEqual(cache.has(3), false);
+    assert.strictEqual(cache.get(4), 5);
+
+    cache.delete(2);
+    check(4);
+    cache.delete(4);
+    check();
+
+    assert.strictEqual((cache as any).newest, null);
+    assert.strictEqual((cache as any).oldest, null);
+  });
+});

node_modules/optimism/src/tests/context.ts

@@ -0,0 +1,208 @@
+import * as assert from "assert";
+import {
+  wrap,
+  setTimeout,
+  asyncFromGen,
+  noContext,
+  nonReactive,
+  Slot,
+} from '../index.js';
+
+describe("asyncFromGen", function () {
+  it("is importable", function () {
+    assert.strictEqual(typeof asyncFromGen, "function");
+  });
+
+  it("works like an async function", asyncFromGen(function*(): Generator<
+    number | Promise<number>,
+    Promise<string>,
+    number
+  > {
+    let sum = 0;
+    const limit = yield new Promise<number>(resolve => {
+      setTimeout(() => resolve(10), 10);
+    });
+    for (let i = 0; i < limit; ++i) {
+      sum += yield i + 1;
+    }
+    assert.strictEqual(sum, 55);
+    return Promise.resolve("ok");
+  }));
+
+  it("properly handles exceptions", async function () {
+    const fn = asyncFromGen(function*(throwee?: object): Generator<
+      Promise<string> | object,
+      string,
+      string
+    > {
+      const result = yield Promise.resolve("ok");
+      if (throwee) {
+        throw yield throwee;
+      }
+      return result;
+    });
+
+    const okPromise = fn();
+    const expected = {};
+    const koPromise = fn(expected);
+
+    assert.strictEqual(await okPromise, "ok");
+
+    try {
+      await koPromise;
+      throw new Error("not reached");
+    } catch (error) {
+      assert.strictEqual(error, expected);
+    }
+
+    try {
+      await fn(Promise.resolve("oyez"));
+      throw new Error("not reached");
+    } catch (thrown) {
+      assert.strictEqual(thrown, "oyez");
+    }
+
+    const catcher = asyncFromGen(function*() {
+      try {
+        yield Promise.reject(new Error("expected"));
+        throw new Error("not reached");
+      } catch (error: any) {
+        assert.strictEqual(error.message, "expected");
+      }
+      return "ok";
+    });
+
+    return catcher().then(result => {
+      assert.strictEqual(result, "ok");
+    });
+  });
+
+  it("can be cached", async function () {
+    let parentCounter = 0;
+    const parent = wrap(asyncFromGen(function*(x: number): Generator<
+      Promise<number>,
+      number,
+      number
+    > {
+      ++parentCounter;
+      const a = yield new Promise<number>(resolve => setTimeout(() => {
+        resolve(child(x));
+      }, 10));
+      const b = yield new Promise<number>(resolve => setTimeout(() => {
+        resolve(child(x + 1));
+      }, 20));
+      return a * b;
+    }));
+
+    let childCounter = 0;
+    const child = wrap((x: number) => {
+      return ++childCounter;
+    });
+
+    assert.strictEqual(parentCounter, 0);
+    assert.strictEqual(childCounter, 0);
+    const parentPromise = parent(123);
+    assert.strictEqual(parentCounter, 1);
+    assert.strictEqual(await parentPromise, 2);
+    assert.strictEqual(childCounter, 2);
+
+    assert.strictEqual(parent(123), parentPromise);
+    assert.strictEqual(parentCounter, 1);
+    assert.strictEqual(childCounter, 2);
+
+    child.dirty(123);
+
+    assert.strictEqual(await parent(123), 3 * 2);
+    assert.strictEqual(parentCounter, 2);
+    assert.strictEqual(childCounter, 3);
+
+    assert.strictEqual(await parent(456), 4 * 5);
+    assert.strictEqual(parentCounter, 3);
+    assert.strictEqual(childCounter, 5);
+
+    assert.strictEqual(parent(666), parent(666));
+    assert.strictEqual(await parent(666), await parent(666));
+    assert.strictEqual(parentCounter, 4);
+    assert.strictEqual(childCounter, 7);
+
+    child.dirty(667);
+
+    assert.strictEqual(await parent(667), 8 * 9);
+    assert.strictEqual(await parent(667), 8 * 9);
+    assert.strictEqual(parentCounter, 5);
+    assert.strictEqual(childCounter, 9);
+
+    assert.strictEqual(await parent(123), 3 * 2);
+    assert.strictEqual(parentCounter, 5);
+    assert.strictEqual(childCounter, 9);
+  });
+});
+
+describe("noContext", function () {
+  it("prevents registering dependencies", function () {
+    let parentCounter = 0;
+    const parent = wrap(() => {
+      return [++parentCounter, noContext(child)];
+    });
+
+    let childCounter = 0;
+    const child = wrap(() => ++childCounter);
+
+    assert.deepEqual(parent(), [1, 1]);
+    assert.deepEqual(parent(), [1, 1]);
+    parent.dirty();
+    assert.deepEqual(parent(), [2, 1]);
+    // Calling child.dirty() does not dirty the parent:
+    child.dirty();
+    assert.deepEqual(parent(), [2, 1]);
+    parent.dirty();
+    assert.deepEqual(parent(), [3, 2]);
+    assert.deepEqual(parent(), [3, 2]);
+    parent.dirty();
+    assert.deepEqual(parent(), [4, 2]);
+  });
+});
+
+describe("nonReactive", function () {
+  const otherSlot = new Slot<string>();
+
+  it("censors only optimism-related context", function () {
+    let innerCounter = 0;
+    const inner = wrap(() => ++innerCounter);
+    const outer = wrap(() => ({
+      fromInner: nonReactive(() => inner()),
+      fromOther: nonReactive(() => otherSlot.getValue()),
+    }));
+    assert.strictEqual(otherSlot.getValue(), undefined);
+    otherSlot.withValue("preserved", () => {
+      assert.deepEqual(outer(), { fromInner: 1, fromOther: "preserved" });
+      assert.deepEqual(outer(), { fromInner: 1, fromOther: "preserved" });
+      inner.dirty();
+      assert.deepEqual(outer(), { fromInner: 1, fromOther: "preserved" });
+      assert.strictEqual(inner(), 2);
+      outer.dirty();
+      assert.deepEqual(outer(), { fromInner: 2, fromOther: "preserved" });
+    });
+    assert.strictEqual(otherSlot.getValue(), undefined);
+  });
+
+  it("same test using noContext, for comparison", function () {
+    let innerCounter = 0;
+    const inner = wrap(() => ++innerCounter);
+    const outer = wrap(() => ({
+      fromInner: noContext(inner),
+      fromOther: noContext(() => otherSlot.getValue()),
+    }));
+    assert.strictEqual(otherSlot.getValue(), undefined);
+    otherSlot.withValue("preserved", () => {
+      assert.deepEqual(outer(), { fromInner: 1, fromOther: void 0 });
+      assert.deepEqual(outer(), { fromInner: 1, fromOther: void 0 });
+      inner.dirty();
+      assert.deepEqual(outer(), { fromInner: 1, fromOther: void 0 });
+      assert.strictEqual(inner(), 2);
+      outer.dirty();
+      assert.deepEqual(outer(), { fromInner: 2, fromOther: void 0 });
+    });
+    assert.strictEqual(otherSlot.getValue(), undefined);
+  });
+});

node_modules/optimism/src/tests/deps.ts

@@ -0,0 +1,183 @@
+import * as assert from "assert";
+import { wrap, dep } from "../index";
+
+describe("OptimisticDependencyFunction<TKey>", () => {
+  it("can dirty OptimisticWrapperFunctions", () => {
+    const numberDep = dep<number>();
+    const stringDep = dep<string>();
+    let callCount = 0;
+
+    const fn = wrap((n: number, s: string) => {
+      numberDep(n);
+      stringDep(s);
+      ++callCount;
+      return s.repeat(n);
+    });
+
+    assert.strictEqual(fn(0, "oyez"), "");
+    assert.strictEqual(callCount, 1);
+    assert.strictEqual(fn(1, "oyez"), "oyez");
+    assert.strictEqual(callCount, 2);
+    assert.strictEqual(fn(2, "oyez"), "oyezoyez");
+    assert.strictEqual(callCount, 3);
+
+    assert.strictEqual(fn(0, "oyez"), "");
+    assert.strictEqual(fn(1, "oyez"), "oyez");
+    assert.strictEqual(fn(2, "oyez"), "oyezoyez");
+    assert.strictEqual(callCount, 3);
+
+    numberDep.dirty(0);
+    assert.strictEqual(fn(0, "oyez"), "");
+    assert.strictEqual(callCount, 4);
+    assert.strictEqual(fn(1, "oyez"), "oyez");
+    assert.strictEqual(callCount, 4);
+    assert.strictEqual(fn(2, "oyez"), "oyezoyez");
+    assert.strictEqual(callCount, 4);
+
+    stringDep.dirty("mlem");
+    assert.strictEqual(fn(0, "oyez"), "");
+    assert.strictEqual(callCount, 4);
+
+    stringDep.dirty("oyez");
+    assert.strictEqual(fn(2, "oyez"), "oyezoyez");
+    assert.strictEqual(callCount, 5);
+    assert.strictEqual(fn(1, "oyez"), "oyez");
+    assert.strictEqual(callCount, 6);
+    assert.strictEqual(fn(0, "oyez"), "");
+    assert.strictEqual(callCount, 7);
+
+    assert.strictEqual(fn(0, "oyez"), "");
+    assert.strictEqual(fn(1, "oyez"), "oyez");
+    assert.strictEqual(fn(2, "oyez"), "oyezoyez");
+    assert.strictEqual(callCount, 7);
+  });
+
+  it("should be forgotten when parent is recomputed", () => {
+    const d = dep<string>();
+    let callCount = 0;
+    let shouldDepend = true;
+
+    const parent = wrap((id: string) => {
+      if (shouldDepend) d(id);
+      return ++callCount;
+    });
+
+    assert.strictEqual(parent("oyez"), 1);
+    assert.strictEqual(parent("oyez"), 1);
+    assert.strictEqual(parent("mlem"), 2);
+    assert.strictEqual(parent("mlem"), 2);
+
+    d.dirty("mlem");
+    assert.strictEqual(parent("oyez"), 1);
+    assert.strictEqual(parent("mlem"), 3);
+
+    d.dirty("oyez");
+    assert.strictEqual(parent("oyez"), 4);
+    assert.strictEqual(parent("mlem"), 3);
+
+    parent.dirty("oyez");
+    shouldDepend = false;
+    assert.strictEqual(parent("oyez"), 5);
+    assert.strictEqual(parent("mlem"), 3);
+    d.dirty("oyez");
+    shouldDepend = true;
+    assert.strictEqual(parent("oyez"), 5);
+    assert.strictEqual(parent("mlem"), 3);
+    // This still has no effect because the previous call to parent("oyez")
+    // was cached.
+    d.dirty("oyez");
+    assert.strictEqual(parent("oyez"), 5);
+    assert.strictEqual(parent("mlem"), 3);
+    parent.dirty("oyez");
+    assert.strictEqual(parent("oyez"), 6);
+    assert.strictEqual(parent("mlem"), 3);
+    d.dirty("oyez");
+    assert.strictEqual(parent("oyez"), 7);
+    assert.strictEqual(parent("mlem"), 3);
+
+    parent.dirty("mlem");
+    shouldDepend = false;
+    assert.strictEqual(parent("oyez"), 7);
+    assert.strictEqual(parent("mlem"), 8);
+    d.dirty("oyez");
+    d.dirty("mlem");
+    assert.strictEqual(parent("oyez"), 9);
+    assert.strictEqual(parent("mlem"), 8);
+    d.dirty("oyez");
+    d.dirty("mlem");
+    assert.strictEqual(parent("oyez"), 9);
+    assert.strictEqual(parent("mlem"), 8);
+    shouldDepend = true;
+    parent.dirty("mlem");
+    assert.strictEqual(parent("oyez"), 9);
+    assert.strictEqual(parent("mlem"), 10);
+    d.dirty("oyez");
+    d.dirty("mlem");
+    assert.strictEqual(parent("oyez"), 9);
+    assert.strictEqual(parent("mlem"), 11);
+  });
+
+  it("supports subscribing and unsubscribing", function () {
+    let subscribeCallCount = 0;
+    let unsubscribeCallCount = 0;
+    let parentCallCount = 0;
+
+    function check(counts: {
+      subscribe: number;
+      unsubscribe: number;
+      parent: number;
+    }) {
+      assert.strictEqual(counts.subscribe, subscribeCallCount);
+      assert.strictEqual(counts.unsubscribe, unsubscribeCallCount);
+      assert.strictEqual(counts.parent, parentCallCount);
+    }
+
+    const d = dep({
+      subscribe(key: string) {
+        ++subscribeCallCount;
+        return () => {
+          ++unsubscribeCallCount;
+        };
+      },
+    });
+
+    assert.strictEqual(subscribeCallCount, 0);
+    assert.strictEqual(unsubscribeCallCount, 0);
+
+    const parent = wrap((key: string) => {
+      d(key);
+      return ++parentCallCount;
+    });
+
+    assert.strictEqual(parent("rawr"), 1);
+    check({ subscribe: 1, unsubscribe: 0, parent: 1 });
+    assert.strictEqual(parent("rawr"), 1);
+    check({ subscribe: 1, unsubscribe: 0, parent: 1 });
+    assert.strictEqual(parent("blep"), 2);
+    check({ subscribe: 2, unsubscribe: 0, parent: 2 });
+    assert.strictEqual(parent("rawr"), 1);
+    check({ subscribe: 2, unsubscribe: 0, parent: 2 });
+    assert.strictEqual(parent("blep"), 2);
+    check({ subscribe: 2, unsubscribe: 0, parent: 2 });
+
+    d.dirty("blep");
+    check({ subscribe: 2, unsubscribe: 1, parent: 2 });
+    assert.strictEqual(parent("rawr"), 1);
+    check({ subscribe: 2, unsubscribe: 1, parent: 2 });
+    d.dirty("blep"); // intentionally redundant
+    check({ subscribe: 2, unsubscribe: 1, parent: 2 });
+    assert.strictEqual(parent("blep"), 3);
+    check({ subscribe: 3, unsubscribe: 1, parent: 3 });
+    assert.strictEqual(parent("blep"), 3);
+    check({ subscribe: 3, unsubscribe: 1, parent: 3 });
+
+    d.dirty("rawr");
+    check({ subscribe: 3, unsubscribe: 2, parent: 3 });
+    assert.strictEqual(parent("blep"), 3);
+    check({ subscribe: 3, unsubscribe: 2, parent: 3 });
+    assert.strictEqual(parent("rawr"), 4);
+    check({ subscribe: 4, unsubscribe: 2, parent: 4 });
+    assert.strictEqual(parent("blep"), 3);
+    check({ subscribe: 4, unsubscribe: 2, parent: 4 });
+  });
+});

node_modules/optimism/src/tests/exceptions.ts

@@ -0,0 +1,76 @@
+import * as assert from "assert";
+import { wrap } from "../index.js";
+
+describe("exceptions", function () {
+  it("should be cached", function () {
+    const error = new Error("expected");
+    let threw = false;
+    function throwOnce() {
+      if (!threw) {
+        threw = true;
+        throw error;
+      }
+      return "already threw";
+    }
+
+    const wrapper = wrap(throwOnce);
+
+    try {
+      wrapper();
+      throw new Error("unreached");
+    } catch (e) {
+      assert.strictEqual(e, error);
+    }
+
+    try {
+      wrapper();
+      throw new Error("unreached");
+    } catch (e) {
+      assert.strictEqual(e, error);
+    }
+
+    wrapper.dirty();
+    assert.strictEqual(wrapper(), "already threw");
+    assert.strictEqual(wrapper(), "already threw");
+    wrapper.dirty();
+    assert.strictEqual(wrapper(), "already threw");
+  });
+
+  it("should memoize a throwing fibonacci function", function () {
+    const fib = wrap((n: number) => {
+      if (n < 2) throw n;
+      try {
+        fib(n - 1);
+      } catch (minusOne: any) {
+        try {
+          fib(n - 2);
+        } catch (minusTwo: any) {
+          throw minusOne + minusTwo;
+        }
+      }
+      throw new Error("unreached");
+    });
+
+    function check(n: number, expected: number) {
+      try {
+        fib(n);
+        throw new Error("unreached");
+      } catch (result) {
+        assert.strictEqual(result, expected);
+      }
+    }
+
+    check(78, 8944394323791464);
+    check(68, 72723460248141);
+    check(58, 591286729879);
+    check(48, 4807526976);
+    fib.dirty(28);
+    check(38, 39088169);
+    check(28, 317811);
+    check(18, 2584);
+    check(8,  21);
+    fib.dirty(20);
+    check(78, 8944394323791464);
+    check(10, 55);
+  });
+});

node_modules/optimism/src/tests/key-trie.ts

@@ -0,0 +1,90 @@
+import * as assert from "assert";
+import { KeyTrie } from "../index";
+
+describe("KeyTrie", function () {
+  it("can be imported", function () {
+    assert.strictEqual(typeof KeyTrie, "function");
+  });
+
+  it("can hold objects weakly", function () {
+    const trie = new KeyTrie<object>(true);
+    assert.strictEqual((trie as any).weakness, true);
+    const obj1 = {};
+    assert.strictEqual(
+      trie.lookup(obj1, 2, 3),
+      trie.lookup(obj1, 2, 3),
+    );
+    const obj2 = {};
+    assert.notStrictEqual(
+      trie.lookup(1, obj2),
+      trie.lookup(1, obj2, 3),
+    );
+    assert.strictEqual((trie as any).weak.has(obj1), true);
+    assert.strictEqual((trie as any).strong.has(obj1), false);
+    assert.strictEqual((trie as any).strong.get(1).weak.has(obj2), true);
+    assert.strictEqual((trie as any).strong.get(1).weak.get(obj2).strong.has(3), true);
+  });
+
+  it("can disable WeakMap", function () {
+    const trie = new KeyTrie<object>(false);
+    assert.strictEqual((trie as any).weakness, false);
+    const obj1 = {};
+    assert.strictEqual(
+      trie.lookup(obj1, 2, 3),
+      trie.lookup(obj1, 2, 3),
+    );
+    const obj2 = {};
+    assert.notStrictEqual(
+      trie.lookup(1, obj2),
+      trie.lookup(1, obj2, 3),
+    );
+    assert.strictEqual(typeof (trie as any).weak, "undefined");
+    assert.strictEqual((trie as any).strong.has(obj1), true);
+    assert.strictEqual((trie as any).strong.has(1), true);
+    assert.strictEqual((trie as any).strong.get(1).strong.has(obj2), true);
+    assert.strictEqual((trie as any).strong.get(1).strong.get(obj2).strong.has(3), true);
+  });
+
+  it("can produce data types other than Object", function () {
+    const symbolTrie = new KeyTrie(true, args => Symbol.for(args.join(".")));
+    const s123 = symbolTrie.lookup(1, 2, 3);
+    assert.strictEqual(s123.toString(), "Symbol(1.2.3)");
+    assert.strictEqual(s123, symbolTrie.lookup(1, 2, 3));
+    assert.strictEqual(s123, symbolTrie.lookupArray([1, 2, 3]));
+    const sNull = symbolTrie.lookup();
+    assert.strictEqual(sNull.toString(), "Symbol()");
+
+    const regExpTrie = new KeyTrie(true, args => new RegExp("^(" + args.join("|") + ")$"));
+    const rXYZ = regExpTrie.lookup("x", "y", "z");
+    assert.strictEqual(rXYZ.test("w"), false);
+    assert.strictEqual(rXYZ.test("x"), true);
+    assert.strictEqual(rXYZ.test("y"), true);
+    assert.strictEqual(rXYZ.test("z"), true);
+    assert.strictEqual(String(rXYZ), "/^(x|y|z)$/");
+
+    class Data {
+      constructor(public readonly args: any[]) {}
+    }
+    const dataTrie = new KeyTrie(true, args => new Data(args));
+    function checkData(...args: any[]) {
+      const data = dataTrie.lookupArray(args);
+      assert.strictEqual(data instanceof Data, true);
+      assert.notStrictEqual(data.args, args);
+      assert.deepEqual(data.args, args);
+      assert.strictEqual(data, dataTrie.lookup(...args));
+      assert.strictEqual(data, dataTrie.lookupArray(arguments));
+      return data;
+    }
+    const datas = [
+      checkData(),
+      checkData(1),
+      checkData(1, 2),
+      checkData(2),
+      checkData(2, 3),
+      checkData(true, "a"),
+      checkData(/asdf/i, "b", function oyez() {}),
+    ];
+    // Verify that all Data objects are distinct.
+    assert.strictEqual(new Set(datas).size, datas.length);
+  });
+});

node_modules/optimism/src/tests/main.ts

@@ -0,0 +1,7 @@
+import "./api";
+import "./deps";
+import "./cache";
+import "./key-trie";
+import "./context";
+import "./exceptions";
+import "./performance";

node_modules/optimism/src/tests/performance.ts

@@ -0,0 +1,86 @@
+import * as assert from "assert";
+import { wrap, dep, KeyTrie } from "../index";
+
+describe("performance", function () {
+  this.timeout(30000);
+
+  it("should be able to tolerate lots of Entry objects", function () {
+    let counter = 0;
+    const child = wrap((a: any, b: any) => counter++);
+    const parent = wrap((obj1: object, num: number, obj2: object) => {
+      child(obj1, counter);
+      child(counter, obj2);
+      return counter++;
+    });
+    for (let i = 0; i < 100000; ++i) {
+      parent({}, i, {});
+    }
+  });
+
+  const keys: object[] = [];
+  for (let i = 0; i < 100000; ++i) {
+    keys.push({ i });
+  }
+
+  it("should be able to tolerate lots of deps", function () {
+    const d = dep<object>();
+    const parent = wrap((id: number) => {
+      keys.forEach(d);
+      return id;
+    });
+    parent(1);
+    parent(2);
+    parent(3);
+    keys.forEach(key => d.dirty(key));
+  });
+
+  it("can speed up sorting with O(array.length) cache lookup", function () {
+    let counter = 0;
+    const trie = new KeyTrie(false);
+    const sort = wrap((array: number[]) => {
+      ++counter;
+      return array.slice(0).sort();
+    }, {
+      makeCacheKey(array) {
+        return trie.lookupArray(array);
+      }
+    });
+
+    assert.deepEqual(sort([2, 1, 5, 4]), [1, 2, 4, 5]);
+    assert.strictEqual(counter, 1);
+    assert.strictEqual(
+      sort([2, 1, 5, 4]),
+      sort([2, 1, 5, 4]),
+    );
+    assert.strictEqual(counter, 1);
+
+    assert.deepEqual(sort([3, 2, 1]), [1, 2, 3]);
+    assert.strictEqual(counter, 2);
+
+    const bigArray: number[] = [];
+    for (let i = 0; i < 100000; ++i) {
+      bigArray.push(Math.round(Math.random() * 100));
+    }
+
+    const bigArrayCopy = bigArray.slice(0);
+    const rawSortStartTime = Date.now();
+    bigArrayCopy.sort();
+    const rawSortTime = Date.now() - rawSortStartTime;
+
+    assert.deepEqual(
+      sort(bigArray),
+      bigArrayCopy,
+    );
+
+    const cachedSortStartTime = Date.now();
+    const cached = sort(bigArray);
+    const cachedSortTime = Date.now() - cachedSortStartTime;
+
+    assert.deepEqual(cached, bigArrayCopy);
+    assert.ok(
+      cachedSortTime <= rawSortTime,
+      `cached: ${cachedSortTime}ms, raw: ${rawSortTime}ms`,
+    );
+    assert.strictEqual(counter, 3);
+  });
+});

node_modules/optimism/src/tests/test-utils.ts

@@ -0,0 +1,14 @@
+export function permutations<T>(array: T[], start = 0): T[][] {
+  if (start === array.length) return [[]];
+  const item = array[start];
+  const results: T[][] = [];
+  permutations<T>(array, start + 1).forEach(perm => {
+    perm.forEach((_, i) => {
+      const copy = perm.slice(0);
+      copy.splice(i, 0, item);
+      results.push(copy);
+    });
+    results.push(perm.concat(item));
+  });
+  return results;
+}