1444113 - 7.99 - 12.85% damp (linux64, osx-10-10, windows10-64, windows7-32) regression on push a2363b01e4eda903f5218052adab44cc6a53e540 (Wed Mar 7 2018)

Status: RESOLVED WONTFIX

(DevTools :: Framework, defect)

Description

[Ionuț Goldan [:igoldan]]

Talos has detected a Firefox performance regression from push:

https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=a2363b01e4eda903f5218052adab44cc6a53e540

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

Regressions:

 13%  damp windows7-32 opt e10s stylo     114.08 -> 128.74
 13%  damp osx-10-10 opt e10s stylo       106.41 -> 119.88
 12%  damp windows7-32 pgo e10s stylo     89.70 -> 100.23
 11%  damp windows10-64 pgo e10s stylo    88.80 -> 98.54
  9%  damp windows10-64 opt e10s stylo    114.54 -> 124.81
  8%  damp linux64 opt e10s stylo         62.67 -> 67.68


You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=11967

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

[Yulia Startsev [:yulia] OOO until July 2026]

Hi! 

This is expected! We just added a new damp test that tests stepping, also the files are larger to account for that which slows down opening speed of the test!

Comment 2

[Ionuț Goldan [:igoldan]]

Ok. I file these to track baseline changes more easily.