1386686 - 5.93 - 11.34% tart / tp5o_scroll (osx-10-10) regression on push 3ba4ec951216 (Tue Aug 1 2017)

Status: RESOLVED WONTFIX

(Firefox :: Theme, defect)

Description

[Joel Maher ( :jmaher ) (UTC -8)]

Talos has detected a Firefox performance regression from push:

https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=3ba4ec951216

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

Regressions:

 11%  tp5o_scroll summary osx-10-10 opt e10s     2.98 -> 3.32
  6%  tart summary osx-10-10 opt e10s            9.18 -> 9.72


You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=8477

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/Buildbot/Talos/Tests

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

Comment 1

[Joel Maher ( :jmaher ) (UTC -8)]

:nhnt11, I see that you authored the patch in bug 1377284, can you take a look at this regression?

Comment 2

[(inactive) Nihanth Subramanya [:nhnt11]]

(In reply to Joel Maher ( :jmaher) (UTC-9) from comment #1)
> :nhnt11, I see that you authored the patch in bug 1377284, can you take a
> look at this regression?

Hi, this regression is expected from that patch. There was plenty of discussion about the perf impact of that change in the bug. :canuckistani gave the final sign off in bug 1377284 comment 23.

Comment 3

[Joel Maher ( :jmaher ) (UTC -8)]

thanks!