pathUtils | fix memory leak

lib/LRUCache.js

@@ -0,0 +1,45 @@
+class LRUCache {
+	/**
+	 * @param {number} maxSize maxSize
+	 */
+	constructor(maxSize) {
+		this._maxSize = maxSize;
+		/** @type {string[]} */
+		this._doublyQueue = [];
+		this._cacheMap = new Map();
+	}
+
+	/**
+	 * @param {string} item item
+	 */
+	get(item) {
+		if (this._cacheMap.has(item)) {
+			const itemData = this._doublyQueue.splice(
+				this._doublyQueue.indexOf(item),
+				1
+			);
+			this._doublyQueue.unshift(item);
+
+			if (itemData.length > 0) {
+				this._cacheMap.set(item, itemData[0]);
+			}
+		}
+	}
+
+	/**
+	 * @param {any} item item
+	 * @param {any} itemData itemData
+	 */
+	set(item, itemData) {
+		if (this._doublyQueue.length === this._maxSize) {
+			const last = this._doublyQueue[this._doublyQueue.length - 1];
+			this._doublyQueue.pop();
+			this._cacheMap.delete(last);
+		}
+
+		this._doublyQueue.unshift(item);
+		this._cacheMap.set(item, itemData);
+	}
+}
+
+module.exports = LRUCache;

lib/util/path.js

@@ -6,6 +6,7 @@
 "use strict";
 
 const path = require("path");
+const { LRUCache } = require("lru-cache");
 
 const CHAR_HASH = "#".charCodeAt(0);
 const CHAR_SLASH = "/".charCodeAt(0);
@@ -170,8 +171,8 @@ const join = (rootPath, request) => {
 };
 exports.join = join;
 
-/** @type {Map<string, Map<string, string | undefined>>} */
-const joinCache = new Map();
+/** @type {LRUCache<string, Map<string, string | undefined>>} */
+const joinCache = new LRUCache({ max: 500 });
 
 /**
  * @param {string} rootPath the root path

package.json

@@ -14,6 +14,7 @@
   },
   "dependencies": {
     "graceful-fs": "^4.2.4",
+    "lru-cache": "^10.2.2",
     "tapable": "^2.2.0"
   },
   "license": "MIT",

yarn.lock

@@ -3063,6 +3063,11 @@ log-update@^4.0.0:
     slice-ansi "^4.0.0"
     wrap-ansi "^6.2.0"
 
+lru-cache@^10.2.2:
+  version "10.2.2"
+  resolved "https://registry.npmjs.org/lru-cache/-/lru-cache-10.2.2.tgz#48206bc114c1252940c41b25b41af5b545aca878"
+  integrity sha512-9hp3Vp2/hFQUiIwKo8XCeFVnrg8Pk3TYNPIR7tJADKi5YfcF7vEaK7avFHTlSy3kOKYaJQaalfEo6YuXdceBOQ==
+
 lru-cache@^5.1.1:
   version "5.1.1"
   resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-5.1.1.tgz#1da27e6710271947695daf6848e847f01d84b920"