Bug: 3.12 - 2.37% pdfpaint bug1791583.pdf / pdfpaint bug1791583.pdf + 1 more (Linux, Windows) regression on Thu May 30 2024
Status: RESOLVED
Priority: --
Resolution: INVALID
Created: 2024-06-07 20:15:21+00:00
Resolved: 2024-06-18 10:15:53+00:00

Perfherder has detected a talos performance regression from push [f725cee6f91235433a0c64c67b5b9326ffd783e6](https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=f725cee6f91235433a0c64c67b5b9326ffd783e6). 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)** |  
|--|--|--|--|--| 
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5094567,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) bug1791583.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 1,772.01 -> 1,827.31 | 
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5096157,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) bug1791583.pdf | windows10-64-shippable-qr | e10s fission stylo webrender | 1,274.78 -> 1,307.87 | 
| [2%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5094467,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) bug1791583.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender | 1,827.93 -> 1,871.22 | 
### Improvements:

| **Ratio** | **Test** | **Platform** | **Options** | **Absolute values (old vs new)** |  
|--|--|--|--|--| 
| [20%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5094839,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) High-Pressure-Measurement-WP-001287.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender | 660.14 -> 527.17 | 
| [9%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5096128,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue10004.pdf | windows10-64-shippable-qr | e10s fission stylo webrender | 380.81 -> 347.35 | 
| [5%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5096310,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue10004.pdf | windows10-64-shippable-qr | e10s fission stylo webrender-sw | 396.54 -> 377.12 | 
| [4%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5094968,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue10004.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 499.37 -> 479.20 | 
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5098152,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) scan-bad.pdf | macosx1015-64-shippable-qr | e10s fission stylo webrender | 566.46 -> 550.09 | 


Details of the alert can be found in the [alert summary](https://treeherder.mozilla.org/perfherder/alerts?id=564), 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 564`

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