Bug: 5.71 - 4.09% pdfpaint issue15292.pdf / pdfpaint pr8808.pdf + 2 more (Linux, Windows) regression on Mon June 3 2024
Status: RESOLVED
Priority: --
Resolution: WONTFIX
Created: 2024-06-07 20:35:00+00:00
Resolved: 2024-06-11 13:19:40+00:00

Perfherder has detected a talos performance regression from push [c76a7635ae4d1ec9db25fa15241d479decc7e76b](https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=c76a7635ae4d1ec9db25fa15241d479decc7e76b). 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)** |  
|--|--|--|--|--| 
| [6%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5095047,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue15292.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 431.52 -> 456.14 | 
| [5%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5095147,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue15292.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender | 433.50 -> 456.81 | 
| [4%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5096903,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) pr8808.pdf | windows10-64-shippable-qr | e10s fission stylo webrender | 265.84 -> 276.93 | 
| [4%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5097002,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) pr8808.pdf | windows10-64-shippable-qr | e10s fission stylo webrender-sw | 266.92 -> 277.83 | 
### Improvements:

| **Ratio** | **Test** | **Platform** | **Options** | **Absolute values (old vs new)** |  
|--|--|--|--|--| 
| [41%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5094906,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) bug1077808.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender | 3,025.06 -> 1,773.47 | 
| [41%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5093708,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) bug1077808.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 3,000.46 -> 1,767.62 | 
| [32%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5098686,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) bug1077808.pdf | macosx1015-64-shippable-qr | e10s fission stylo webrender | 2,105.15 -> 1,428.35 | 
| [32%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5095548,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) bug1077808.pdf | windows10-64-shippable-qr | e10s fission stylo webrender | 1,926.91 -> 1,313.27 | 
| [32%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5095648,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) bug1077808.pdf | windows10-64-shippable-qr | e10s fission stylo webrender-sw | 1,863.03 -> 1,271.70 | 
|...|...|...|...|...|
| [2%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5097753,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue13794.pdf | macosx1015-64-shippable-qr | e10s fission stylo webrender-sw | 1,027.86 -> 1,006.15 | 


Details of the alert can be found in the [alert summary](https://treeherder.mozilla.org/perfherder/alerts?id=613), 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 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.

You can run these tests on try with `./mach try perf --alert 613`

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