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.
14% tp5n nonmain_startup_fileio windows7-32 pgo e10s stylo 2,619,678.67 -> 2,985,549.00
9% tp5n time_to_session_store_window_restored_ms windows7-32 pgo e10s stylo 758.15 -> 825.84
5% tp5n main_startup_fileio windows7-32 pgo e10s stylo 97,353,382.17 -> 102,347,779.67
You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=19823
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