1955269 - 9.92 - 6% pdfpaint issue1985.pdf / pdfpaint issue1049.pdf + 55 more (Linux, OSX, Windows) regression on Fri March 14 2025

Status: RESOLVED WONTFIX

(Firefox :: PDF Viewer, defect)

Description

[Treeherder Bug Filer]

Perfherder has detected a talos performance regression from push 15663329ae689d334c9099ed1b5ea5a1a166fdc8. As author of one of the patches included in that push, we need your help to address this regression.

Regressions:

Ratio	Test	Platform	Options	Absolute values (old vs new)
10%	pdfpaint issue1985.pdf	macosx1470-64-shippable	e10s fission stylo webrender-sw	210.69 -> 231.58
10%	pdfpaint issue1998.pdf	macosx1470-64-shippable	e10s fission stylo webrender-sw	267.03 -> 293.35
9%	pdfpaint issue1912.pdf	macosx1470-64-shippable	e10s fission stylo webrender-sw	258.02 -> 280.24
9%	pdfpaint issue6413.pdf	windows11-64-shippable-qr	e10s fission stylo webrender-sw	130.57 -> 141.67
8%	pdfpaint issue14562.pdf	windows11-64-shippable-qr	e10s fission stylo webrender-sw	440.02 -> 477.06
8%	pdfpaint issue2386.pdf	macosx1470-64-shippable	e10s fission stylo webrender-sw	269.35 -> 291.29
8%	pdfpaint issue14562.pdf	windows11-64-24h2-shippable	e10s fission stylo webrender-sw	436.76 -> 471.10
8%	pdfpaint issue3351.2.pdf	macosx1470-64-shippable	e10s fission stylo webrender-sw	732.54 -> 789.15
7%	pdfpaint issue3351.2.pdf	macosx1470-64-shippable	e10s fission stylo webrender-sw	729.16 -> 782.98
7%	pdfpaint issue1985.pdf	windows11-64-shippable-qr	e10s fission stylo webrender	138.22 -> 148.26
...	...	...	...	...
6%	pdfpaint issue14105.pdf	windows11-64-24h2-shippable	e10s fission stylo webrender	170.27 -> 180.59
6%	pdfpaint endchar.pdf	windows11-64-24h2-shippable	e10s fission stylo webrender-sw	137.06 -> 145.35
6%	pdfpaint issue1096.pdf	windows11-64-24h2-shippable	e10s fission stylo webrender	151.99 -> 161.18
6%	pdfpaint issue16114.pdf	windows11-64-24h2-shippable	e10s fission stylo webrender-sw	143.13 -> 151.77
6%	pdfpaint issue1049.pdf	windows11-64-shippable-qr	e10s fission stylo webrender-sw	171.87 -> 182.19

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
30%	pdfpaint issue15559.pdf	macosx1470-64-shippable	e10s fission stylo webrender	4,520.52 -> 3,160.02
27%	pdfpaint issue15559.pdf	macosx1470-64-shippable	e10s fission stylo webrender	4,554.84 -> 3,312.56
10%	pdfpaint bug1755201.pdf	macosx1470-64-shippable	e10s fission stylo webrender	379.02 -> 340.05
8%	pdfpaint aboutstacks.pdf	windows11-64-shippable-qr	e10s fission stylo webrender	215.27 -> 198.61
7%	pdfpaint bug1755201.pdf	linux1804-64-shippable-qr	e10s fission stylo webrender	456.84 -> 423.07
...	...	...	...	...
6%	pdfpaint bug1755201.pdf	linux1804-64-shippable-qr	e10s fission stylo webrender	458.15 -> 428.58

Details of the alert can be found in the alert summary, including links to graphs and comparisons for each of the affected tests. Please follow our guide to handling regression bugs and let us know your plans within 3 business days, or the patch(es) may be backed out in accordance with our regression policy.

If you need the profiling jobs you can trigger them yourself from treeherder job view or ask a sheriff to do that for you.

You can run all of these tests on try with ./mach try perf --alert 44352

The following documentation link provides more information about this command.

For more information on performance sheriffing please see our FAQ.

If you have any questions, please do not hesitate to reach out to [e-mail].

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1953809

Comment 2

[Calixte Denizet (:calixte)]

The regression is because we load qcms in order to parse an icc profile in order to convert CMYK to sRGB.
The "guilty" patch improves the color rendering and the regression was expected.