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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Memory leak in tests with zone.js \u003e= 0.9.0","articleBody":"\u003c!--🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅\r\n\r\nOh hi there! 😄\r\n\r\nTo expedite issue processing please search open and closed issues before submitting a new one.\r\nExisting issues often contain information about workarounds, resolution, or progress updates.\r\n\r\n🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅--\u003e\r\n\r\n\r\n# 🐞 bug report\r\n\r\n### Affected Package\r\n\u003c!-- Can you pin-point one or more @angular/* packages as the source of the bug? --\u003e\r\n\u003c!-- ✍️edit: --\u003e The issue is caused by package:\r\n**zone.js: 0.9.0**\r\n\r\n### Is this a regression?\r\n\r\n\u003c!-- Did this behavior use to work in the previous version? --\u003e\r\nYes. The tests didn't cause Chrome to crash.\r\n\r\n### Description\r\nWhen I've upgraded zone.js from 0.8.26 to 0.9.0 or higher, this problem appeared. I have 3000 unit/integration tests. We use heavily dynamic component creation. Our tests currently cannot be executed at once, because zone.js(the timers patch) keeps a reference to tasks created from **setTimeout()** in **tasksByHandleId** in the patch method.  When I call **clearTimeout()** in ngOnDestroy() I can see that the task is not removed from tasksByHandleId because it's status is **notScheduled**.\r\n\r\n## 🔬 Minimal Reproduction\r\nhttps://github.com/belchevgb/zonejs-memory-leak\r\n\r\n## 🌍  Your Environment\r\n\r\n**Angular Version:**\r\n\u003cpre\u003e\u003ccode\u003e\r\nAngular CLI: 11.0.6\r\nNode: 14.3.0\r\nOS: win32 x64\r\n\r\nAngular: 11.0.7\r\n... animations, common, compiler, compiler-cli, core, forms\r\n... platform-browser, platform-browser-dynamic, router\r\nIvy Workspace: Yes\r\n\r\nPackage                         Version\r\n---------------------------------------------------------\r\n@angular-devkit/architect       0.1100.6\r\n@angular-devkit/build-angular   0.1100.6\r\n@angular-devkit/core            11.0.6\r\n@angular-devkit/schematics      11.0.6\r\n@angular/cli                    11.0.6\r\n@schematics/angular             11.0.6\r\n@schematics/update              0.1100.6\r\nrxjs                            6.6.3\r\ntypescript                      4.0.5\r\nzone.js                         0.10.2\r\n\u003c/code\u003e\u003c/pre\u003e\r\n\r\n**Anything else relevant?**\r\n[SNAPSHOT](https://drive.google.com/file/d/1T7tUuZZPBdiOS1amHcBLWNXWhRNzArKo/view?usp=sharing)\r\n![image](https://user-images.githubusercontent.com/15705336/104160957-a92a8e80-53fa-11eb-870b-656e9e946189.png)","author":{"url":"https://github.com/belchevgb","@type":"Person","name":"belchevgb"},"datePublished":"2021-01-11T08:13:23.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":12},"url":"https://github.com/40387/angular/issues/40387"}