1495068 - 2.73 - 13% tps regression on push 126409bdf326 (Wed Sep 26 2018)

Status: RESOLVED WONTFIX

(Testing :: Talos, defect)

Description

[Andrew Swan [:aswan]]

+++ This bug was initially created as a clone of Bug #1494882 +++

[Peeling off just the tps regressions from the original bug]

Talos has detected a Firefox performance regression from push:

https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=1b268215517c906a22e5341b3978f5b551e92328&tochange=126409bdf326645e735ee147bd70bd7d09759165

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

Regressions:

 13%  tps windows7-32 opt e10s stylo                                 11.46 -> 12.98
 11%  tps windows10-64 pgo e10s stylo                                11.23 -> 12.44
 10%  tps windows7-32 pgo e10s stylo                                 10.22 -> 11.24

Comment 1

[Ionuț Goldan [:igoldan]]

Anybody looking over this bug?

Comment 2

[Andrew Swan [:aswan]]

I am not currently looking at this

Comment 3

[Ionuț Goldan [:igoldan]]

:mconley do you have the time to look over this harness bug or hand it to someone else? Thanks!

Comment 4

[Mike Conley (:mconley) (:⚙️)]

(In reply to Ionuț Goldan [:igoldan], Performance Sheriffing from comment #3)
> :mconley do you have the time to look over this harness bug or hand it to
> someone else? Thanks!

I'm afraid I don't - though, especially given that the patch that landed was really just a change in how we run Talos tests, I don't think this is something that our users would ever feel.

I'm going to WONTFIX this. Please re-open if you disagree.