1701147 - 2.13 - 2.68% ts_paint (windows10-64-shippable-qr) regression on push 5bdaa8ec66488662ba88e5d1ec0e21cba0771f6b (Tue March 23 2021)

Status: RESOLVED WONTFIX

(Firefox :: Theme, defect)

Description

[Alexandru Ionescu (needinfo me) [:alexandrui]]

Perfherder has detected a talos performance regression from push 5bdaa8ec66488662ba88e5d1ec0e21cba0771f6b. As author of one of the patches included in that push, we need your help to address this regression.

Regressions:

Ratio	Suite	Test	Platform	Options	Absolute values (old vs new)
3%	ts_paint	ts_paint	windows10-64-shippable-qr	e10s stylo webrender-sw	390.38 -> 400.83
2%	ts_paint	ts_paint	windows10-64-shippable-qr	e10s stylo webrender-sw	397.79 -> 406.25

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 offending patch(es) will be backed out in accordance with our regression policy.

For more information on performance sheriffing please see our FAQ.

Comment 1

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

Set release status flags based on info from the regressing bug 1692320

Comment 2

[Jared Wein [:jaws] (please needinfo? me)]

The patch in bug 1692320 only changes the color of the selected tab in Alpenglow theme, which isn't enabled in automated tests as far as I know and the change is just a CSS color change so this would be really surprising to regress performance. Can you see if this was regressed by a different changeset?

Comment 3

[Alexandru Ionescu (needinfo me) [:alexandrui]]

There's lots of noise there. I did some additional retriggers.

Comment 4

[Alexandru Ionescu (needinfo me) [:alexandrui]]

The graph didn't reveal something new, but seems like it has a constant tendency to come back to the before values.

Comment 5

[Alexandru Ionescu (needinfo me) [:alexandrui]]

Any news here?

Comment 6

[Alex Finder]

Hi Alex! The alert linked to this defect is no longer visible, and there hasn't been an update on this issue for the past 2 years. Any suggestions as a follow-up ?