Bug: 13.84% perf_reftest_singletons id-getter-2.html (Windows) regression on Wed June 14 2023
Status: RESOLVED
Priority: --
Resolution: WORKSFORME
Created: 2023-06-16 19:40:51+00:00
Resolved: 2023-07-18 12:32:42+00:00

Hi :gregtatum,
This alert was generated from: https://treeherder.mozilla.org/jobs?repo=autoland&revision=379da4a3c107c5db724c73619cde6773ee13e14d
Which includes both bug 1837078, and 1836505
Based on the content of 1836505 I figured this bug was the more likely culprit, if I put down the wrong bug file a need info and I will re-generate the bug on the correct ticket

Perfherder has detected a talos performance regression from push [379da4a3c107c5db724c73619cde6773ee13e14d](https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=379da4a3c107c5db724c73619cde6773ee13e14d). As author of one of the patches included in that push, we need your help to address this regression.

== Change summary for alert #38727 (as of Fri, 16 Jun 2023 22:50:53 GMT) ==

### Regressions:

| **Ratio** | **Test** | **Platform** | **Options** | **Absolute values (old vs new)** |  
|--|--|--|--|--|
| [14%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,4768621,1,1)  | [perf_reftest_singletons](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#perf_reftest_singletons) id-getter-2.html | windows10-64-shippable-qr | e10s fission stylo webrender | 499.59 -> 568.72 |
### Improvements:

| **Ratio** | **Test** | **Platform** | **Options** | **Absolute values (old vs new)** |  
|--|--|--|--|--|
| [14%](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 | 4.11 -> 3.54 |
| [13%](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 | 4.28 -> 3.73 |
| [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 | 3.45 -> 3.01 |
| [12%](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 | 4.29 -> 3.77 |

For up to date results, see: https://treeherder.mozilla.org/perfherder/alerts?id=38727


Details of the alert can be found in the [alert summary](https://treeherder.mozilla.org/perfherder/alerts?id=38727), 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).