4.83 - 4.38% speedometer React-TodoMVC/CompletingAllItems/Async / speedometer React-TodoMVC/CompletingAllItems/Async (OSX) regression on Tue August 5 2025
Categories
(Core :: JavaScript Engine, defect, P1)
Tracking
()
| Tracking | Status | |
|---|---|---|
| firefox-esr128 | --- | unaffected |
| firefox-esr140 | --- | unaffected |
| firefox142 | --- | unaffected |
| firefox143 | --- | fix-optional |
| firefox144 | --- | fix-optional |
People
(Reporter: intermittent-bug-filer, Assigned: jonco)
References
(Blocks 1 open bug, Regression)
Details
(Keywords: perf, perf-alert, regression)
Perfherder has detected a browsertime performance regression from push 1ec8400efa8aa040fa5605534389e66932e5f6ab. As author of one of the patches included in that push, we need your help to address this regression.
Please acknowledge, and begin investigating this alert within 3 business days, or the patch(es) may be backed out in accordance with our regression policy. Our guide to handling regression bugs has information about how you can proceed with this investigation.
If you have any questions or need any help with the investigation, please reach out to fbilt@mozilla.com. Alternatively, you can find help on Slack by joining #perf-help, and on Matrix you can find help by joining #perftest.
Regressions:
| Ratio | Test | Platform | Options | Absolute values (old vs new) | Performance Profiles |
|---|---|---|---|---|---|
| 5% | speedometer React-TodoMVC/CompletingAllItems/Async | macosx1500-aarch64-shippable | fission webrender | 0.59 -> 0.62 | Before/After |
| 4% | speedometer React-TodoMVC/CompletingAllItems/Async | macosx1500-aarch64-shippable | fission webrender | 0.59 -> 0.62 | Before/After |
Details of the alert can be found in the alert summary, including links to graphs and comparisons for each of the affected tests.
If you need the profiling jobs you can trigger them yourself from treeherder job view or ask fbilt@mozilla.com to do that for you.
You can run all of these tests on try with ./mach try perf --alert 46284
The following documentation link provides more information about this command.
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Comment 1•1 year ago
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Set release status flags based on info from the regressing bug 1980126
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Updated•1 year ago
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Updated•1 year ago
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Assignee | |
Comment 3•1 year ago
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I don't see any relation between the changes in bug 1980126 and this performance change.
The code touched by that bug does not show up in any of the profiles of the test. It's also a refactoring and doesn't change behaviour or any algorithms used.
The performance change only shows up on one macOS platform and not the other macOS platform or any other platform.
Absent any other performance change linked to that bug I'm going close this as WONTFIX.
Description
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