Bug: 11.26 - 2.49% pdfpaint issue9262_reduced.pdf / pdfpaint issue8795_reduced.pdf + 13 more (Linux, OSX, Windows) regression on Fri October 25 2024
Status: RESOLVED
Priority: --
Resolution: WONTFIX
Created: 2024-10-30 21:51:04+00:00
Resolved: 2024-11-08 14:25:23+00:00

Perfherder has detected a talos performance regression from push [dc7525e3426bfc6827b32eb43ea844be861c9578](https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=dc7525e3426bfc6827b32eb43ea844be861c9578). 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)** |  
|--|--|--|--|--| 
| [11%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5094202,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue9262_reduced.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 798.45 -> 888.33 | 
| [9%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5098252,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue16081.pdf | macosx1015-64-shippable-qr | e10s fission stylo webrender-sw | 481.81 -> 524.56 | 
| [8%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5095072,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue16081.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 646.51 -> 698.08 | 
| [7%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5095172,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue16081.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender | 693.55 -> 739.21 | 
| [6%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,225606,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue18801.pdf | windows11-64-shippable-qr | e10s fission stylo webrender-sw | 353.31 -> 375.10 | 
| [6%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5093816,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue14297.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 583.35 -> 615.66 | 
| [5%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5093578,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue13193.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender | 388.99 -> 410.17 | 
| [5%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5094178,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue8570.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 299.65 -> 314.28 | 
| [5%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,107497,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue16081.pdf | windows11-64-shippable-qr | e10s fission stylo webrender-sw | 288.76 -> 302.75 | 
| [4%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5098380,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue9262_reduced.pdf | macosx1015-64-shippable-qr | e10s fission stylo webrender | 645.71 -> 668.47 | 
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,84567,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue9262_reduced.pdf | windows11-64-shippable-qr | e10s fission stylo webrender | 351.25 -> 362.75 | 
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5098081,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue9262_reduced.pdf | macosx1015-64-shippable-qr | e10s fission stylo webrender-sw | 649.50 -> 670.40 | 
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,107382,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue9262_reduced.pdf | windows11-64-shippable-qr | e10s fission stylo webrender-sw | 349.71 -> 360.42 | 
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,107058,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue13193.pdf | windows11-64-shippable-qr | e10s fission stylo webrender-sw | 172.75 -> 177.34 | 
| [2%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5094185,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue8795_reduced.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender-sw | 3,492.43 -> 3,579.53 | 
### Improvements:

| **Ratio** | **Test** | **Platform** | **Options** | **Absolute values (old vs new)** |  
|--|--|--|--|--| 
| [85%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&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 | 2,623.90 -> 402.07 | 
| [85%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5093567,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue12841_reduced.pdf | linux1804-64-shippable-qr | e10s fission stylo webrender | 2,681.41 -> 411.05 | 
| [84%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5098845,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue12841_reduced.pdf | macosx1015-64-shippable-qr | e10s fission stylo webrender | 2,161.22 -> 355.98 | 
| [84%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,5097725,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue12841_reduced.pdf | macosx1015-64-shippable-qr | e10s fission stylo webrender-sw | 2,147.12 -> 353.72 | 
| [79%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,84220,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue12841_reduced.pdf | windows11-64-shippable-qr | e10s fission stylo webrender | 1,104.13 -> 230.17 | 
|...|...|...|...|...|
| [3%](https://treeherder.mozilla.org/perfherder/graphs?timerange=1209600&series=autoland,107205,1,1)  | [pdfpaint](https://firefox-source-docs.mozilla.org/testing/perfdocs/talos.html#pdfpaint) issue7303.pdf | windows11-64-shippable-qr | e10s fission stylo webrender-sw | 171.21 -> 166.72 | 


Details of the alert can be found in the [alert summary](https://treeherder.mozilla.org/perfherder/alerts?id=2748), 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 all of these tests on try with `./mach try perf --alert 2748`

The following [documentation link](https://firefox-source-docs.mozilla.org/testing/perfdocs/mach-try-perf.html#running-alert-tests) provides more information about this command.

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

If you have any questions, please do not hesitate to reach out to aglavic@mozilla.com.