1617162 - 29.31 - 43.28% glterrain / tscrollx (windows10-64-shippable-qr) regression on push 311c703cb4e7ed220c255f6a3ec41a9cd0781889 (Wed February 19 2020)

Status: RESOLVED DUPLICATE of bug 1611800

(Core :: Graphics: WebRender, defect)

Description

[Florin Strugariu [:Bebe]]

Talos has detected a Firefox performance regression from push:

https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=311c703cb4e7ed220c255f6a3ec41a9cd0781889

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

Regressions:

43% glterrain windows10-64-shippable-qr opt e10s stylo 1.13 -> 1.62
30% tscrollx windows10-64-shippable-qr opt e10s stylo 0.88 -> 1.15
29% tscrollx windows10-64-shippable-qr opt e10s stylo 0.89 -> 1.14

You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=25054

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 Talos jobs in a pushlog format.

To learn more about the regressing test(s), please see: https://wiki.mozilla.org/TestEngineering/Performance/Talos

For information on reproducing and debugging the regression, either on try or locally, see: https://wiki.mozilla.org/TestEngineering/Performance/Talos/Running

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

Our wiki page outlines the common responses and expectations: https://wiki.mozilla.org/TestEngineering/Performance/Talos/RegressionBugsHandling

Comment 1

[Jeff Muizelaar [:jrmuizel]]

This is the same regression as bug 1611800 as we're just reenabling the same code.