Bug: 32.58 - 2.23% tp5o responsiveness / startup_about_home_paint_realworld_webextensions + 6 more (Linux, Windows) regression on Mon May 29 2023
Status: RESOLVED
Priority: P2
Resolution: FIXED
Created: 2023-06-02 11:15:51+00:00
Resolved: 2024-08-03 15:24:37+00:00

Perfherder has detected a talos performance regression from push [8e03224a019c674d3b61c734ae819e8557cef17f](https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=8e03224a019c674d3b61c734ae819e8557cef17f). As author of one of the patches included in that push, we need your help to address this regression.

### Regressions:

| **Ratio** | **Test** | **Platform** | **Options** | **Absolute values (old vs new)** |  
|--|--|--|--|--| 
| [33%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4769032,1,1)  | [tp5o](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o) responsiveness | windows10-64-shippable-qr | e10s fission stylo webrender-sw | 0.82 -> 1.09 | 
| [25%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4768697,1,1)  | [tp5o](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o) responsiveness | windows10-64-shippable-qr | e10s fission stylo webrender | 0.89 -> 1.11 | 
| [18%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4767960,1,1)  | [tp5o_webext](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o_webext) responsiveness | linux1804-64-shippable-qr | e10s fission stylo webrender | 3.69 -> 4.36 | 
| [17%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4767759,1,1)  | [tp5o](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o) responsiveness | linux1804-64-shippable-qr | e10s fission stylo webrender | 2.99 -> 3.52 | 
| [17%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4768015,1,1)  | [tp5o_webext](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o_webext) responsiveness | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 3.48 -> 4.06 | 
| [14%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4767511,1,1)  | [tp5o](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o) responsiveness | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 2.87 -> 3.27 | 
| [13%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4767759,1,1)  | [tp5o](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o) responsiveness | linux1804-64-shippable-qr | e10s fission stylo webrender | 3.01 -> 3.38 | 
| [2%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4768506,1,1)  | [startup_about_home_paint_realworld_webextensions](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#startup_about_home_paint_realworld_webextensions) | windows10-64-shippable-qr | e10s fission stylo webrender | 659.79 -> 674.50 | 


Details of the alert can be found in the [alert summary](https://treeherder.mozilla.org/perfherder/alerts?id=38535), including links to graphs and comparisons for each of the affected tests. Please follow our [guide to handling regression bugs](https://wiki.mozilla.org/TestEngineering/Performance/Handling_regression_bugs) and **let us know your plans within 3 business days, or the offending patch(es) may be backed out** in accordance with our [regression policy](https://www.mozilla.org/en-US/about/governance/policies/regressions/).

If you need the profiling jobs you can trigger them yourself from treeherder job view or ask a sheriff to do that for you.

For more information on performance sheriffing please see our [FAQ](https://wiki.mozilla.org/TestEngineering/Performance/FAQ).