2.02% damp browser-toolbox.inspector-ready.DAMP (Windows) regression on Thu June 26 2025
Categories
(Firefox :: Migration, defect)
Tracking
()
| Tracking | Status | |
|---|---|---|
| firefox-esr128 | --- | unaffected |
| firefox-esr140 | --- | unaffected |
| firefox140 | --- | unaffected |
| firefox141 | --- | affected |
| firefox142 | --- | affected |
People
(Reporter: intermittent-bug-filer, Unassigned)
References
(Regression)
Details
(4 keywords)
Perfherder has detected a devtools performance regression from push 670943479839da29b914f2e089c4cbb1e9cc0188. 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) |
|---|---|---|---|---|
| 2% | damp browser-toolbox.inspector-ready.DAMP | windows11-64-24h2-shippable | e10s fission stylo webrender | 283.92 -> 289.66 |
Improvements:
| Ratio | Test | Platform | Options | Absolute values (old vs new) |
|---|---|---|---|---|
| 4% | damp jstracer.webconsole-performance.DAMP | windows11-64-24h2-shippable | e10s fission stylo webrender | 2,104.10 -> 2,010.76 |
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 45868
The following documentation link provides more information about this command.
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Updated•4 months ago
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Comment 1•4 months ago
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Set release status flags based on info from the regressing bug 1971702
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Comment 2•4 months ago
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This is a DevTools test, which measures the performance of loading (in this case) the Inspector. Nothing about bug 1971702 changed how the Inspector works, but may have influenced the environment of the test (so not a real regression). As in prior instances of regressions like this for DAMP tests, I'm going to close this as WONTFIX.
Description
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