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67 lines
2.0 KiB
67 lines
2.0 KiB
4 years ago
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const validateOptions = require("schema-utils");
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const schema = require("../../schemas/plugins/optimize/OccurrenceOrderChunkIdsPlugin.json");
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/** @typedef {import("../../declarations/plugins/optimize/OccurrenceOrderChunkIdsPlugin").OccurrenceOrderChunkIdsPluginOptions} OccurrenceOrderChunkIdsPluginOptions */
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class OccurrenceOrderChunkIdsPlugin {
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/**
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* @param {OccurrenceOrderChunkIdsPluginOptions=} options options object
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*/
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constructor(options = {}) {
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validateOptions(schema, options, "Occurrence Order Chunk Ids Plugin");
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this.options = options;
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}
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apply(compiler) {
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const prioritiseInitial = this.options.prioritiseInitial;
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compiler.hooks.compilation.tap(
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"OccurrenceOrderChunkIdsPlugin",
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compilation => {
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compilation.hooks.optimizeChunkOrder.tap(
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"OccurrenceOrderChunkIdsPlugin",
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chunks => {
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const occursInInitialChunksMap = new Map();
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const originalOrder = new Map();
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let i = 0;
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for (const c of chunks) {
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let occurs = 0;
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for (const chunkGroup of c.groupsIterable) {
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for (const parent of chunkGroup.parentsIterable) {
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if (parent.isInitial()) occurs++;
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}
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}
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occursInInitialChunksMap.set(c, occurs);
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originalOrder.set(c, i++);
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}
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chunks.sort((a, b) => {
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if (prioritiseInitial) {
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const aEntryOccurs = occursInInitialChunksMap.get(a);
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const bEntryOccurs = occursInInitialChunksMap.get(b);
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if (aEntryOccurs > bEntryOccurs) return -1;
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if (aEntryOccurs < bEntryOccurs) return 1;
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}
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const aOccurs = a.getNumberOfGroups();
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const bOccurs = b.getNumberOfGroups();
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if (aOccurs > bOccurs) return -1;
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if (aOccurs < bOccurs) return 1;
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const orgA = originalOrder.get(a);
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const orgB = originalOrder.get(b);
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return orgA - orgB;
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});
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}
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);
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}
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);
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}
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}
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module.exports = OccurrenceOrderChunkIdsPlugin;
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