1588761 - 2.62 - 11.12% tscrollx / tsvg_static (windows10-64-shippable) regression on push 7c6cde9fc234a11abb7df32be1be547afd32a6ae (Wed October 9 2019)

Status: RESOLVED INVALID

(Core :: JavaScript Engine, defect)

Description

[Marian Raiciof [:marauder]]

Talos has detected a Firefox performance regression from push:

https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=7c6cde9fc234a11abb7df32be1be547afd32a6ae

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

Regressions:

11% tsvg_static windows10-64-shippable opt e10s stylo 33.26 -> 36.95
3% tscrollx windows10-64-shippable opt e10s stylo 0.57 -> 0.59

You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=23402

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

[Steven DeTar [:sdetar]]

David, could you look into this regression, it seems the push that caused this might be yours.

Comment 2

[David Teller [:Yoric] - still alive but not very active]

I've looked at the push, it does not affect any code that is actually executed in this test. Looks very much like noise or a false positive.

Comment 3

[Jim Mathies [:jimm]]

Looks like noise from the graphs.

Comment 4

[Marian Raiciof [:marauder]]

Thanks for the info!