make the cache a WeakMap to not leak memory

fixes #6929
webpack · Jul 5, 2018 · 64b22c4 · 64b22c4
1 parent bdd4442
commit 64b22c4
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lib/optimize/SplitChunksPlugin.js b/lib/optimize/SplitChunksPlugin.js
@@ -135,7 +135,8 @@ module.exports = class SplitChunksPlugin {
 
 	static normalizeName({ name, automaticNameDelimiter }) {
 		if (name === true) {
-			const cache = new Map();
+			/** @type {WeakMap<Chunk[], Record<string, string>>} */
+			const cache = new WeakMap();
 			const fn = (module, chunks, cacheGroup) => {
 				let cacheEntry = cache.get(chunks);
 				if (cacheEntry === undefined) {