Talos has detected a Firefox performance regression from push: https://hg.mozilla.org/integration/autoland/pushloghtml?changeset=9d89b33a35a3ae9e252a43038fa649180bf07491 As author of one of the patches included in that push, we need your help to address this regression. Regressions: 9% a11yr summary macosx64-devedition opt e10s 484.39 -> 527.46 6% a11yr summary windows7-32 pgo e10s 442.43 -> 467.30 4% damp summary windows7-32 pgo e10s 200.26 -> 208.84 4% damp summary windows7-32 opt e10s 258.70 -> 268.71 You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=8078 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/Buildbot/Talos/Tests For information on reproducing and debugging the regression, either on try or locally, see: https://wiki.mozilla.org/Buildbot/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/Buildbot/Talos/RegressionBugsHandling

Mike, the Talos changes somehow affected at least these 2 tests. Were they expected? Or can we continue with them from now on?

The description above doesn't hint to the right changeset. This is the correct one: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=7d43eed8af31c61d2c6e56b9b4882ef59631a91f&tochange=c9fc3cee23936687c84a9cc4120fe05c5fe972cf

(In reply to Ionuț Goldan [:igoldan], Performance Sheriffing from comment #1) > Mike, the Talos changes somehow affected at least these 2 tests. Were they > expected? Or can we continue with them from now on? Unsure why this affected a11yr like this, but since it was just a test change, I suggest we re-baseline and move on.