Talos has detected a Firefox performance regression from push:
As author of one of the patches included in that push, we need your help to address this regression.
223% tp5n main_normal_fileio windows10-64-shippable opt e10s stylo 909,433.08 -> 2,937,438.17
196% tp5n main_normal_fileio windows10-64-shippable-qr opt e10s stylo 936,182.42 -> 2,772,094.33
153% tp5n main_normal_fileio windows10-64-shippable-qr opt e10s stylo 1,109,984.50 -> 2,803,193.67
You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=24961
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