1549341 - 0.55 - 0.64% installer size (linux32-shippable, linux64-shippable, osx-shippable, windows2012-32-shippable, windows2012-64-shippable) regression on push 34dd0113415f1aa2b4fd8e457006e28b047a185d (Thu May 2 2019)

Status: RESOLVED WONTFIX

(Firefox :: New Tab Page, defect, P3)

Description

[Ionuț Goldan [:igoldan]]

We have detected a build metrics regression from push:

https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=34dd0113415f1aa2b4fd8e457006e28b047a185d

As author of one of the patches included in that push, we need your help to address this regression.

Regressions:

1% installer size windows2012-64-shippable opt nightly 71,314,032.58 -> 71,770,600.75
1% installer size windows2012-32-shippable opt nightly 68,626,356.17 -> 69,057,696.92
1% installer size linux32-shippable opt nightly 70,495,181.96 -> 70,908,055.92
1% installer size osx-shippable opt nightly 77,703,381.92 -> 78,158,292.17
1% installer size osx-shippable opt gcp nightly 77,717,656.50 -> 78,147,231.42
1% installer size linux64-shippable opt nightly 70,303,777.12 -> 70,686,961.92

You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=20750

On the page above you can see an alert for each affected platform as well as a link to a graph showing the history of scores for this test. There is also a link to a treeherder page showing the jobs in a pushlog format.

To learn more about the regressing test(s), please see: https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Automated_Performance_Testing_and_Sheriffing/Build_Metrics

*** Please let us know your plans within 3 business days, or the offending patch(es) will be backed out! ***

Comment 1

[Ed Lee :Mardak]

The regression matches up with the 468KB of images added as part of trailhead. These are all needed for now as part of the firstrun experiments. There may be potential for some image optimization to find common aspects of multiple images and layer them with css. And maybe even convert some layers to svg if smaller.

Comment 2

[Florin Strugariu [:Bebe]]

From comment 1