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fix resolver cache

This commit is contained in:
Tobias Koppers 2018-10-22 09:02:39 +02:00
parent f60c9a7070
commit 9964a8283f
1 changed files with 32 additions and 8 deletions
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40
lib/ResolverFactory.js
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@ -8,6 +8,8 @@
const Factory = require("enhanced-resolve").ResolverFactory;
const { HookMap, SyncHook, SyncWaterfallHook } = require("tapable");
/** @typedef {import("enhanced-resolve/lib/Resolver")} Resolver */
module.exports = class ResolverFactory {
constructor() {
this.hooks = Object.freeze({
@ -16,21 +18,43 @@ module.exports = class ResolverFactory {
),
resolver: new HookMap(() => new SyncHook(["resolver", "resolveOptions"]))
});
this.cache1 = new WeakMap();
this.cache2 = new Map();
/** @type {Map<string, { direct: WeakMap<Object, Resolver>, stringified: Map<string, Resolver> }>} */
this.cache = new Map();
}
/**
* @param {string} type type of resolver
* @param {Object} resolveOptions options
* @returns {Resolver} the resolver
*/
get(type, resolveOptions) {
const cachedResolver = this.cache1.get(resolveOptions);
if (cachedResolver) return cachedResolver();
const ident = `${type}|${JSON.stringify(resolveOptions)}`;
const resolver = this.cache2.get(ident);
if (resolver) return resolver;
let typedCaches = this.cache.get(type);
if (!typedCaches) {
typedCaches = {
direct: new WeakMap(),
stringified: new Map()
};
this.cache.set(type, typedCaches);
}
const cachedResolver = typedCaches.direct.get(resolveOptions);
if (cachedResolver) return cachedResolver;
const ident = JSON.stringify(resolveOptions);
const resolver = typedCaches.stringified.get(ident);
if (resolver) {
typedCaches.direct.set(resolveOptions, resolver);
return resolver;
}
const newResolver = this._create(type, resolveOptions);
this.cache2.set(ident, newResolver);
typedCaches.direct.set(resolveOptions, newResolver);
typedCaches.stringified.set(ident, newResolver);
return newResolver;
}
/**
* @param {string} type type of resolver
* @param {Object} resolveOptions options
* @returns {Resolver} the resolver
*/
_create(type, resolveOptions) {
resolveOptions = this.hooks.resolveOptions.for(type).call(resolveOptions);
const resolver = Factory.createResolver(resolveOptions);