Talos has detected a Firefox performance regression from push:

https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?changeset=754f9877d4baec49ba19f60b81fad85076aec5fc

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

Regressions:

4% tp5o windows10-64-qr opt e10s stylo 125.81 -> 130.26
3% tp5o windows7-32 opt e10s stylo 128.46 -> 132.94
3% tp5o windows10-64 opt e10s stylo 130.18 -> 133.63
3% tp5o windows10-64 pgo e10s stylo 116.94 -> 119.90
2% tsvgr_opacity linux64 opt e10s stylo 154.69 -> 158.54
2% tp5o linux64 pgo e10s stylo 125.41 -> 128.37
2% tp5o linux64 opt e10s stylo 139.20 -> 142.45
2% tp5o linux64-qr opt e10s stylo 139.11 -> 142.11
2% tp5o_webext windows7-32 pgo e10s stylo 158.51 -> 161.86

You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=19050

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/Performance_sheriffing/Talos/Tests

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

:smaug one of the bugs created this regression can you take a look and see which one is the cause