12.06 - 4.76% perf_reftest_singletons remove-child-with-lengthy-text.html / perf_reftest_singletons remove-child-with-lengthy-text.html (Linux) regression on Sun June 23 2024
Categories
(Core :: Layout: Block and Inline, defect)
Tracking
()
People
(Reporter: aglavic, Unassigned)
References
(Regression)
Details
(4 keywords)
Perfherder has detected a talos performance regression from push 46b26e2046605eeda18e19a69c5f67259a3c8563. 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) |
|---|---|---|---|---|
| 12% | perf_reftest_singletons remove-child-with-lengthy-text.html | linux1804-64-shippable-qr | e10s fission stylo webrender | 2.38 -> 2.66 |
| 5% | perf_reftest_singletons remove-child-with-lengthy-text.html | linux1804-64-shippable-qr | e10s fission stylo webrender | 2.36 -> 2.47 |
Details of the alert can be found in the alert summary, including links to graphs and comparisons for each of the affected tests. Please follow our guide to 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.
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You can run these tests on try with ./mach try perf --alert 1010
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Comment 1•5 days ago
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This regression is expected. remove-child-with-lengthy-text.html was originally added in bug 1901515, which improved the performance of the test from hundreds of milliseconds down to single-digit milliseconds. However, the optimization was unsound. Bug 1903652 reworks the optimization, which is expected to do more work but guarantees correctness.
Description
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