2021586 - 17.24 - 2.03% vpl-h264 estimatedAnyFrameLatency + 11 more (Linux) regression on Wed March 4 2026

Status: RESOLVED DUPLICATE of bug 2021592

(Core :: Graphics, defect)

Description

[Treeherder Bug Filer]

Perfherder has detected a browsertime performance regression from push 2efc0479a9399f05634fad15d9b34e5a06ecefa9. 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]	Performance Profiles
17%	vpl-h264 estimatedAnyFrameLatency (doc)	linux2404-64-shippable	fission warm webrender	115.12 ms -> 134.97 ms	Before/After
15%	vpl-vp9 estimatedAnyFrameLatency (doc)	linux2404-64-shippable	fission warm webrender	95.57 ms -> 109.92 ms	Before/After
14%	vpl-vp9 estimatedAnyFrameLatency (doc)	linux2404-64-shippable	cold fission webrender	136.34 ms -> 156.07 ms	Before/After
12%	vpl-h264 secondFrame (doc)	linux2404-64-shippable	fission warm webrender	216.59 ms -> 242.09 ms	Before/After
11%	vpl-vp9 estimatedAnyFrameLatency (doc)	linux1804-64-shippable-qr	cold fission webrender	124.25 ms -> 138.27 ms	Before/After
10%	vpl-vp9 secondFrame (doc)	linux2404-64-shippable	cold fission webrender	252.36 ms -> 278.14 ms	Before/After
8%	vpl-vp9 estimatedFirstFrameLatency (doc)	linux1804-64-shippable-qr	cold fission webrender	112.55 -> 121.91	Before/After
8%	vpl-vp9 firstFrame (doc)	linux1804-64-shippable-qr	cold fission webrender	112.55 -> 121.91	Before/After
7%	vpl-vp9 estimatedAnyFrameLatency (doc)	linux1804-64-shippable-qr	fission warm webrender	93.60 -> 100.04	Before/After
7%	vpl-vp9 secondFrame (doc)	linux1804-64-shippable-qr	cold fission webrender	241.55 ms -> 258.01 ms	Before/After
2%	vpl-h264 lastFrame (doc)	linux2404-64-shippable	fission warm webrender	1,064.84 ms -> 1,091.38 ms	Before/After
2%	vpl-vp9 lastFrame (doc)	linux2404-64-shippable	cold fission webrender	1,102.33 ms -> 1,124.65 ms	Before/After

Support & Actionable Steps

For questions, please contact [e-mail]. 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 48979 (See documentation link for details).
• Profiling jobs: Trigger jobs from Treeherder job view or request them from [e-mail].

Comment 2

[Timothy Nikkel (:tnikkel)]

Pretty sure the patch I will post to bug 2021592 will take care of this.