1865829 - 33.5 - 16.94% espn loadtime / wikia LastVisualChange + 3 more (OSX) regression on Tue November 14 2023

Status: RESOLVED FIXED

(Core :: Layout: Text and Fonts, defect)

Description

[Acasandrei Beatrice (needinfo me)]

Perfherder has detected a browsertime performance regression from push 19d87a3a7a39edf262e54cb7dc683a7e71fcad51. 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)	Performance Profiles
34%	espn loadtime	macosx1015-64-shippable-qr	cold fission webrender	1,529.83 -> 2,042.29	Before/After
28%	espn loadtime	macosx1015-64-shippable-qr	cold fission webrender	1,495.58 -> 1,908.87	Before/After
25%	fandom loadtime	macosx1015-64-shippable-qr	cold fission webrender	959.38 -> 1,198.82	Before/After
20%	fandom loadtime	macosx1015-64-shippable-qr	bytecode-cached cold fission webrender	969.27 -> 1,159.40	Before/After
17%	wikia LastVisualChange	macosx1015-64-shippable-qr	fission warm webrender	1,174.61 -> 1,373.53	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. 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.

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Comment 1

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

Set release status flags based on info from the regressing bug 1803406

Comment 2

[Ryan VanderMeulen (PTO, back July 27)]

Numbers have all recovered since bug 1866105.