Talos has detected a Firefox performance regression from push:

https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=7fa90877a45bd1b70b0d49fad6f4cb9718c3b7b7

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

Regressions:

5% tsvgx linux64-shippable-qr opt e10s stylo 243.36 -> 254.99
5% tsvgx linux64-shippable-qr opt e10s stylo 243.26 -> 254.75

You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=23072

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

This is somewhat expected. I'll try to take a look today to better understand why.

Thank you, Jeff!

I had a look at one of the subtests and it looks like we're get some unexpected invalidations.

It looks like this was specifically caused by https://hg.mozilla.org/integration/autoland/rev/3b17e84b9bf83bd15d3c43079bf356eb08040aa8

And it looks like most if not all of this has been recovered by bug 1425871

Or rather bug 1570081

Marian, can we close this as fixed?

Hi Jeff,
I will close this as fixed and mark the alert accordingly.
Thank you!