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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
commite06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch)
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Diffstat (limited to 'node_modules/webpack/lib/optimize/AggressiveMergingPlugin.js')
-rw-r--r--node_modules/webpack/lib/optimize/AggressiveMergingPlugin.js87
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diff --git a/node_modules/webpack/lib/optimize/AggressiveMergingPlugin.js b/node_modules/webpack/lib/optimize/AggressiveMergingPlugin.js
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+/*
+ MIT License http://www.opensource.org/licenses/mit-license.php
+ Author Tobias Koppers @sokra
+*/
+"use strict";
+
+class AggressiveMergingPlugin {
+ constructor(options) {
+ if (
+ (options !== undefined && typeof options !== "object") ||
+ Array.isArray(options)
+ ) {
+ throw new Error(
+ "Argument should be an options object. To use defaults, pass in nothing.\nFor more info on options, see https://webpack.js.org/plugins/"
+ );
+ }
+ this.options = options || {};
+ }
+
+ apply(compiler) {
+ const options = this.options;
+ const minSizeReduce = options.minSizeReduce || 1.5;
+
+ compiler.hooks.thisCompilation.tap(
+ "AggressiveMergingPlugin",
+ compilation => {
+ compilation.hooks.optimizeChunksAdvanced.tap(
+ "AggressiveMergingPlugin",
+ chunks => {
+ let combinations = [];
+ chunks.forEach((a, idx) => {
+ if (a.canBeInitial()) return;
+ for (let i = 0; i < idx; i++) {
+ const b = chunks[i];
+ if (b.canBeInitial()) continue;
+ combinations.push({
+ a,
+ b,
+ improvement: undefined
+ });
+ }
+ });
+
+ for (const pair of combinations) {
+ const a = pair.b.size({
+ chunkOverhead: 0
+ });
+ const b = pair.a.size({
+ chunkOverhead: 0
+ });
+ const ab = pair.b.integratedSize(pair.a, {
+ chunkOverhead: 0
+ });
+ let newSize;
+ if (ab === false) {
+ pair.improvement = false;
+ return;
+ } else {
+ newSize = ab;
+ }
+
+ pair.improvement = (a + b) / newSize;
+ }
+ combinations = combinations.filter(pair => {
+ return pair.improvement !== false;
+ });
+ combinations.sort((a, b) => {
+ return b.improvement - a.improvement;
+ });
+
+ const pair = combinations[0];
+
+ if (!pair) return;
+ if (pair.improvement < minSizeReduce) return;
+
+ if (pair.b.integrate(pair.a, "aggressive-merge")) {
+ chunks.splice(chunks.indexOf(pair.a), 1);
+ return true;
+ }
+ }
+ );
+ }
+ );
+ }
+}
+
+module.exports = AggressiveMergingPlugin;