1774806 - 2.08 - 2.02% Base Content Resident Unique Memory / Base Content Resident Unique Memory (OSX) regression on Tue June 14 2022

Status: RESOLVED FIXED

(Core :: General, defect)

Description

[Andra Esanu (needinfo me)]

Perfherder has detected a awsy performance regression from push 67e74bdb1d3b50fa726e20f87bd53db491e3bcd0. 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)
2%	Base Content Resident Unique Memory	macosx1015-64-shippable-qr	fission	7,960,576.00 -> 8,125,952.00
2%	Base Content Resident Unique Memory	macosx1015-64-shippable-qr	fission	7,963,989.33 -> 8,124,757.33

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.

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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 1773399

Comment 2

[Mike Hommey [:glandium]]

It's taking some time because of the turn-around times from getting awsy results, but so far I've identified this comes from unicode-normalization. My guess at this point is that it comes from the update from unicode 9 to unicode 13.

Comment 3

[Mike Hommey [:glandium]]

Long story short: it was because of some changes that replaced functions with tables, and those tables are large arrays of slices...

Comment 4

[Mike Hommey [:glandium]]

Attachment: Bug 1774806 - Update unicode-normalization to 0.2.10.

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/9b5734ce89d3
Update unicode-normalization to 0.2.10. r=emilio,supply-chain-reviewers

Comment 6

[Natalia Csoregi [:nataliaCs]]

https://hg.mozilla.org/mozilla-central/rev/9b5734ce89d3

Comment 7

[Acasandrei Beatrice (needinfo me)]

== Change summary for alert #34662 (as of Tue, 28 Jun 2022 12:37:41 GMT) ==

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
2%	Base Content Resident Unique Memory	macosx1015-64-shippable-qr	fission	8,133,973.33 -> 7,940,096.00
2%	Base Content Resident Unique Memory	macosx1015-64-shippable-qr	fission	8,111,616.00 -> 7,941,290.67

For up to date results, see: https://treeherder.mozilla.org/perfherder/alerts?id=34662

Comment 8

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

Set release status flags based on info from the regressing bug 1773399