18 - 6.38% pdfpaint High-Pressure-Measurement-WP-001287.pdf + 3 more (Linux) regression on Fri March 13 2026
Categories
(Core :: Graphics: WebRender, defect)
Tracking
()
| Tracking | Status | |
|---|---|---|
| firefox-esr140 | --- | unaffected |
| firefox148 | --- | unaffected |
| firefox149 | --- | unaffected |
| firefox150 | --- | affected |
People
(Reporter: intermittent-bug-filer, Unassigned)
References
(Regression)
Details
(4 keywords)
Perfherder has detected a talos performance regression from push d7f12a1404635f04c0d345fdbd942cd8b6ac9cfa. 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.
| Regression | Test | Platform | Options | Absolute values [old vs new] |
|---|---|---|---|---|
| 18% | pdfpaint High-Pressure-Measurement-WP-001287.pdf (doc) | linux2404-64-shippable | e10s fission stylo webrender | 385.72 ms -> 455.15 ms |
| 15% | pdfpaint High-Pressure-Measurement-WP-001287.pdf (doc) | linux2404-64-shippable | e10s fission stylo webrender | 396.66 ms -> 454.77 ms |
| 11% | pdfpaint bpl13210.pdf (doc) | linux2404-64-shippable | e10s fission stylo webrender | 345.37 ms -> 382.48 ms |
| 6% | pdfpaint annotation-tx3.pdf (doc) | linux2404-64-shippable | e10s fission stylo webrender | 340.33 ms -> 362.04 ms |
| Improvement | Test | Platform | Options | Absolute values [old vs new] |
|---|---|---|---|---|
| 16% | tart (doc) | linux2404-64-shippable | e10s fission stylo webrender | 8.57 -> 7.18 |
Support & Actionable Steps
For questions, please contact afinder@mozilla.com. You can also find help on Slack (#perf-help) or Matrix (#perftest).
Action guide details:
- See the guide to handling regression bugs for investigation steps.
- Review the alert summary for affected tests, graphs, and comparisons.
- Check the PerfCompare results.
- Tests on Try: Run all tests using
./mach try perf --alert 49174(See documentation link for details). - Profiling jobs: Trigger jobs from Treeherder job view or request them from afinder@mozilla.com.
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Comment 1•5 months ago
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Set release status flags based on info from the regressing bug 2013682
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Comment 2•5 months ago
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This is a needed change for the upcoming sidebar styling changes. The tart improvements are expected, we can live with the pdfpaint regression for now (more work is being done in this area over the next month or so which is likely to improve it).
Description
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