1841829 - 0.13 - 0.1% (123 KB) apk-size-fenixNightly / apk-size-fenixDebug (Android) regression on Tue June 27 2023

Status: RESOLVED WONTFIX

(Fenix :: Performance, defect, P2)

Description

[Chris Peterson [:cpeterson]]

Perfherder has detected a build_metrics performance regression from push 722c6015632f84f97e686dca68ecc680bf945366. 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)
0.13%	apk-size-fenixNightly	fenix-android-all		95,731,509.15 -> 95,858,071.50
0.10%	apk-size-fenixDebug	fenix-android-all		118,264,873.25 -> 118,379,105.50

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) may be backed out in accordance with our regression policy.

For more information on performance sheriffing please see our FAQ.

Comment 1

[Chris Peterson [:cpeterson]]

The x86_64 APK size regressed 136,252 bytes.

afinder shared this firefox-android regression range:

https://github.com/mozilla-mobile/firefox-android/compare/3ec70a932913829d0b3cef0b0df116f5ce077c04...722c6015632f84f97e686dca68ecc680bf945366

And the GeckoView update's corresponding mozilla-central pushlog:

https://hg.mozilla.org/mozilla-central/pushloghtml?changeset=0b2ed348e59cd519fd45eb9dda2ed2e4aa2af42a

Language detection bug 1836974 looks suspicious, though it both landed and was backed out in the same mozilla-central pushlog.

Comment 2

[Chris Peterson [:cpeterson]]

Perfherder graph with the alert:

https://treeherder.mozilla.org/perfherder/graphs?highlightAlerts=1&highlightChangelogData=1&highlightCommonAlerts=0&series=firefox-android,4670243,1,2&series=firefox-android,4670244,1,2&series=firefox-android,4670245,1,2&series=firefox-android,4670246,1,2&series=firefox-android,4670242,1,2

Comment 3

[Chris Peterson [:cpeterson]]

Resolving as WONTFIX because we've chosen to focus on moving from APKs to AABs (bug 1809938). I'm linking this bug to bug 1805286 (the Fenix APK size meta bug) so we can analyze this regression if we later focus on actively reducing the Fenix app size.