8.69% instagram loadtime (Linux) regression on Tue October 21 2025
Categories
(Core :: Security: PSM, defect)
Tracking
()
People
(Reporter: intermittent-bug-filer, Unassigned)
References
(Regression)
Details
(Keywords: perf, perf-alert, regression)
Perfherder has detected a browsertime performance regression from push 2a14d0de87691fb714543af284db34c8dc3f05bf. 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 |
|---|---|---|---|---|---|
| 9% | instagram loadtime | linux1804-64-shippable-qr | bytecode-cached fission warm webrender | 276.78 -> 300.82 | 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 47222
The following documentation link provides more information about this command.
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Updated•7 months ago
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Updated•7 months ago
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Description
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