26.34 - 10.47% damp source-map-loader.init.DAMP / damp server.protocoljs.DAMP (Linux) regression on Thu March 27 2025
Categories
(DevTools :: Debugger, defect)
Tracking
(firefox139 affected)
| Tracking | Status | |
|---|---|---|
| firefox139 | --- | affected |
People
(Reporter: intermittent-bug-filer, Assigned: bomsy)
References
(Regression)
Details
(4 keywords)
Perfherder has detected a devtools performance regression from push d6d0e9638e38122b6aa450f676333dfb0b771a1d. 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 afinder@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) |
|---|---|---|---|---|
| 26% | damp source-map-loader.init.DAMP | linux1804-64-shippable-qr | e10s fission stylo webrender | 101.61 -> 128.38 |
| 10% | damp server.protocoljs.DAMP | linux1804-64-shippable-qr | e10s fission stylo webrender | 727.60 -> 803.79 |
Improvements:
| Ratio | Test | Platform | Options | Absolute values (old vs new) |
|---|---|---|---|---|
| 4% | damp custom.jsdebugger.stepOut.big-bundle.DAMP | linux1804-64-shippable-qr | e10s fission stylo webrender | 967.02 -> 927.29 |
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 afinder@mozilla.com to do that for you.
You can run all of these tests on try with ./mach try perf --alert 44555
The following documentation link provides more information about this command.
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Updated•21 days ago
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Assignee | |
Comment 1•17 days ago
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The fixes in Bug 1945467 should ideally not impact on these regressed tests as its just UI work. I'll do a bit of investigation.
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Assignee | |
Updated•16 days ago
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Comment 2•16 days ago
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Looks like a GC which happens at a different time during the test.
Description
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