Bug: 40.09 - 28.37% tp5o_webext responsiveness / tp5o_webext responsiveness + 1 more (Linux) regression on Wed June 15 2022
Status: RESOLVED
Priority: --
Resolution: WONTFIX
Created: 2022-06-28 20:19:28+00:00
Resolved: 2022-07-14 15:50:50+00:00

Perfherder has detected a talos performance regression from push [2e7ecad460f2be1275a59b7f55c4ff5a8fe3274e](https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=2e7ecad460f2be1275a59b7f55c4ff5a8fe3274e). 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)**| 
|--|--|--|--|--| 
| [40%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4086385,1,1)  | [tp5o_webext](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o_webext) responsiveness | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 2.28 -> 3.20 |
| [31%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4086455,1,1)  | [tp5o](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o) responsiveness | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 1.88 -> 2.47 |
| [28%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,3869335,1,1)  | [tp5o_webext](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o_webext) responsiveness | linux1804-64-shippable-qr | e10s fission stylo webrender | 2.29 -> 2.93 |
### Improvements:

| **Ratio** | **Test** | **Platform** | **Options** | **Absolute values (old vs new)**| 
|--|--|--|--|--| 
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,3869282,1,1)  | [tp5o_webext](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o_webext)  | linux1804-64-shippable-qr | e10s fission stylo webrender | 283.18 -> 273.58 |
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4086332,1,1)  | [tp5o_webext](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o_webext)  | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 269.40 -> 260.43 |
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4086402,1,1)  | [tp5o](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#tp5o)  | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 204.57 -> 198.18 |


Details of the alert can be found in the [alert summary](https://treeherder.mozilla.org/perfherder/alerts?id=34566), 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) will 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).