114 lines
3.3 KiB
JavaScript
114 lines
3.3 KiB
JavaScript
|
/*
|
||
|
|
MIT License http://www.opensource.org/licenses/mit-license.php
|
||
|
|
Author Tobias Koppers @sokra
|
||
|
|
*/
|
||
|
|
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
const { STAGE_ADVANCED } = require("../OptimizationStages");
|
||
|
|
const createSchemaValidation = require("../util/create-schema-validation");
|
||
|
|
|
||
|
|
/** @typedef {import("../../declarations/plugins/optimize/MinChunkSizePlugin").MinChunkSizePluginOptions} MinChunkSizePluginOptions */
|
||
|
|
/** @typedef {import("../Chunk")} Chunk */
|
||
|
|
/** @typedef {import("../Compiler")} Compiler */
|
||
|
|
|
||
|
|
const validate = createSchemaValidation(
|
||
|
|
require("../../schemas/plugins/optimize/MinChunkSizePlugin.check.js"),
|
||
|
|
() => require("../../schemas/plugins/optimize/MinChunkSizePlugin.json"),
|
||
|
|
{
|
||
|
|
name: "Min Chunk Size Plugin",
|
||
|
|
baseDataPath: "options"
|
||
|
|
}
|
||
|
|
);
|
||
|
|
|
||
|
|
class MinChunkSizePlugin {
|
||
|
|
/**
|
||
|
|
* @param {MinChunkSizePluginOptions} options options object
|
||
|
|
*/
|
||
|
|
constructor(options) {
|
||
|
|
validate(options);
|
||
|
|
this.options = options;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Apply the plugin
|
||
|
|
* @param {Compiler} compiler the compiler instance
|
||
|
|
* @returns {void}
|
||
|
|
*/
|
||
|
|
apply(compiler) {
|
||
|
|
const options = this.options;
|
||
|
|
const minChunkSize = options.minChunkSize;
|
||
|
|
compiler.hooks.compilation.tap("MinChunkSizePlugin", compilation => {
|
||
|
|
compilation.hooks.optimizeChunks.tap(
|
||
|
|
{
|
||
|
|
name: "MinChunkSizePlugin",
|
||
|
|
stage: STAGE_ADVANCED
|
||
|
|
},
|
||
|
|
chunks => {
|
||
|
|
const chunkGraph = compilation.chunkGraph;
|
||
|
|
const equalOptions = {
|
||
|
|
chunkOverhead: 1,
|
||
|
|
entryChunkMultiplicator: 1
|
||
|
|
};
|
||
|
|
|
||
|
|
const chunkSizesMap = new Map();
|
||
|
|
/** @type {[Chunk, Chunk][]} */
|
||
|
|
const combinations = [];
|
||
|
|
/** @type {Chunk[]} */
|
||
|
|
const smallChunks = [];
|
||
|
|
const visitedChunks = [];
|
||
|
|
for (const a of chunks) {
|
||
|
|
// check if one of the chunks sizes is smaller than the minChunkSize
|
||
|
|
// and filter pairs that can NOT be integrated!
|
||
|
|
if (chunkGraph.getChunkSize(a, equalOptions) < minChunkSize) {
|
||
|
|
smallChunks.push(a);
|
||
|
|
for (const b of visitedChunks) {
|
||
|
|
if (chunkGraph.canChunksBeIntegrated(b, a))
|
||
|
|
combinations.push([b, a]);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
for (const b of smallChunks) {
|
||
|
|
if (chunkGraph.canChunksBeIntegrated(b, a))
|
||
|
|
combinations.push([b, a]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
chunkSizesMap.set(a, chunkGraph.getChunkSize(a, options));
|
||
|
|
visitedChunks.push(a);
|
||
|
|
}
|
||
|
|
|
||
|
|
const sortedSizeFilteredExtendedPairCombinations = combinations
|
||
|
|
.map(pair => {
|
||
|
|
// extend combination pairs with size and integrated size
|
||
|
|
const a = chunkSizesMap.get(pair[0]);
|
||
|
|
const b = chunkSizesMap.get(pair[1]);
|
||
|
|
const ab = chunkGraph.getIntegratedChunksSize(
|
||
|
|
pair[0],
|
||
|
|
pair[1],
|
||
|
|
options
|
||
|
|
);
|
||
|
|
/** @type {[number, number, Chunk, Chunk]} */
|
||
|
|
const extendedPair = [a + b - ab, ab, pair[0], pair[1]];
|
||
|
|
return extendedPair;
|
||
|
|
})
|
||
|
|
.sort((a, b) => {
|
||
|
|
// sadly javascript does an in place sort here
|
||
|
|
// sort by size
|
||
|
|
const diff = b[0] - a[0];
|
||
|
|
if (diff !== 0) return diff;
|
||
|
|
return a[1] - b[1];
|
||
|
|
});
|
||
|
|
|
||
|
|
if (sortedSizeFilteredExtendedPairCombinations.length === 0) return;
|
||
|
|
|
||
|
|
const pair = sortedSizeFilteredExtendedPairCombinations[0];
|
||
|
|
|
||
|
|
chunkGraph.integrateChunks(pair[2], pair[3]);
|
||
|
|
compilation.chunks.delete(pair[3]);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
module.exports = MinChunkSizePlugin;
|