feat(replay): Use unwrapped setTimeout to avoid e.g. angular change detection#11924
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feat(replay): Use unwrapped setTimeout to avoid e.g. angular change detection#11924
setTimeout to avoid e.g. angular change detection#11924Conversation
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mydea
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This moves some code around in `browser-utils` so we can-reuse the logic for getting the unwrapped fetch implementation to also get the unwrapped `setTimeout` implementation. E.g. Angular wraps this for change detection, which can lead to performance degration.
This reverts commit 78221f5.
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billyvg
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May 21, 2024
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| function isNative(func: Function): boolean { | ||
| return func && /^function\s+\w+\(\)\s+\{\s+\[native code\]\s+\}$/.test(func.toString()); | ||
| } |
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I added this, which is a generic version of this: https://github.com/getsentry/sentry-javascript/blob/develop/packages/browser/src/transports/utils.ts#L56-L58
Without this tracing/metrics/web-vitals-fid was failing consistently. Is the sandboxed version just too slow for our browser tests? cc @mydea
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hmm this looks reasonable. TBH the web-vitals tests are a bit of a black box to me, they appear/are brittle overall 😬 if that makes it pass, all good from my POV!
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May 22, 2024
This makes the `isNativeFetch` check a bit more generic/naive. It no longer checks that the function name matches `fetch` explicitly, but I think thats ok. Follow-up to #11924
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This PR makes sure we use the native, unwrapped
setTimeoutimplementation of the browser. Some environments, e.g. Angular, monkey patch this for their change detection, leading to performance issues (possibly). We have already changed this in rrweb, but we also have some usage of this in replay itself.This PR should work fine, however all test fail today because we heavily use
jest.useFakeTimers(), which basically monkey patches fetch too. So with this change, we do not use the patched timers, leading to everything blowing up 🤯Based on #11864
Depends on #11899