4.14 - 3.41% espn fcp / espn fcp (Linux) regression on Wed October 6 2021
Categories
(Core :: JavaScript: GC, defect)
Tracking
()
| Tracking | Status | |
|---|---|---|
| firefox-esr78 | --- | unaffected |
| firefox-esr91 | --- | unaffected |
| firefox93 | --- | unaffected |
| firefox94 | --- | wontfix |
| firefox95 | --- | wontfix |
People
(Reporter: alexandrui, Unassigned)
References
(Regression)
Details
(Keywords: perf, perf-alert, regression)
Perfherder has detected a browsertime performance regression from push 383bc0cb137958b34519e90427ad8495358d0132. 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% | espn fcp | linux1804-64-shippable-qr | warm webrender | 413.02 -> 430.12 |
| 3% | espn fcp | linux1804-64-shippable-qr | warm webrender | 417.02 -> 431.25 |
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 offending patch(es) will be backed out in accordance with our regression policy.
For more information on performance sheriffing please see our FAQ.
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Comment 1•3 years ago
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Set release status flags based on info from the regressing bug 1717553
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Comment 2•3 years ago
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Bug 1717553 fixed a large memory leak on popular sites and reverted our behaviour to that of a few months prior. I don't know why this has caused performance changes; I suspect it's caused a change in GC timing (the results are multi-modal and fairly noisy). As long as the impact is not too great we do want to keep this change.
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Updated•3 years ago
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Updated•3 years ago
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Description
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