1163518 - 13-18% Linux*/Win* damp regression on Fx-Team-Non-PGO (v.40) on May 08, 2015 from push 2bda9fb3b5d6

Status: RESOLVED WONTFIX

(Testing :: Talos, defect)

Description

[Vaibhav (:vaibhav1994)]

Talos has detected a Firefox performance regression from your commit 2bda9fb3b5d6 in bug 862341.  We need you to address this regression.

This is a list of all known regressions and improvements related to your bug:
http://alertmanager.allizom.org:8080/alerts.html?rev=2bda9fb3b5d6&showAll=1

On the page above you can see Talos 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, please see: https://wiki.mozilla.org/Buildbot/Talos/Tests#DAMP

Reproducing and debugging the regression:
If you would like to re-run this Talos test on a potential fix, use try with the following syntax:
try: -b o -p linux,win64,win32 -u none -t g2  # add "mozharness: --spsProfile" to generate profile data

To run the test locally and do a more in-depth investigation, first set up a local Talos environment:
https://wiki.mozilla.org/Buildbot/Talos/Running#Running_locally_-_Source_Code

Then run the following command from the directory where you set up Talos:
talos --develop -e <path>/firefox -a damp

Making a decision:
As the patch author we need your feedback to help us handle this regression.

Our wiki page oulines the common responses and expectations:
https://wiki.mozilla.org/Buildbot/Talos/RegressionBugsHandling

Comment 1

[Vaibhav (:vaibhav1994)]

Panos, I see in https://bugzilla.mozilla.org/show_bug.cgi?id=862341#c45, that this regression was expected. So kindly look into it and if possible fix it, else we can mark this bug as WONT FIX.

Comment 2

[Panos Astithas (he/him) [:past] (please ni?)]

Yes, I think we need to live with this regression. We will keep looking for ways to improve toolbox startup performance of course.