Bug: 3.91 - 2.08% pdfpaint issue12716.pdf / pdfpaint issue7828.pdf + 3 more (Linux, OSX) regression on Mon June 10 2024
Status: RESOLVED
Priority: --
Resolution: WONTFIX
Created: 2024-07-02 08:44:38+00:00
Resolved: 2024-07-08 07:50:55+00:00

Perfherder has detected a talos performance regression from push [94c41e775853bfa74cbfc9252b39305298d7fb6d](https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=94c41e775853bfa74cbfc9252b39305298d7fb6d). 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)** |  
|--|--|--|--|--| 
| [4%](https://treeherder.mozilla.org/perfherder/graphs?timerange=2592000&series=autoland,5098839,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue12716.pdf | macosx1015-64-shippable-qr | e10s fission stylo webrender | 586.72 -> 609.69 | 
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=2592000&series=autoland,5093767,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue12841_reduced.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 2,605.39 -> 2,693.83 | 
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=2592000&series=autoland,5098839,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue12716.pdf | macosx1015-64-shippable-qr | e10s fission stylo webrender | 586.07 -> 605.65 | 
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=2592000&series=autoland,5097719,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue12716.pdf | macosx1015-64-shippable-qr | e10s fission stylo webrender-sw | 591.99 -> 611.32 | 
| [2%](https://treeherder.mozilla.org/perfherder/graphs?timerange=2592000&series=autoland,5098321,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue7828.pdf | macosx1015-64-shippable-qr | e10s fission stylo webrender | 668.24 -> 682.16 | 
### Improvements:

| **Ratio** | **Test** | **Platform** | **Options** | **Absolute values (old vs new)** |  
|--|--|--|--|--| 
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=2592000&series=autoland,5094303,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) xfa_bug1716980.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 2,940.78 -> 2,867.20 | 


Details of the alert can be found in the [alert summary](https://treeherder.mozilla.org/perfherder/alerts?id=903), 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 903`

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