We don't normally sheriff ARES6 using talos/perfherder (at least yet) but I noticed a regression in our existing data, which might need to be addressed (if it hasn't been already) On the compare view, it appears that the regressions are (primarily?) in the babylon_firstIteration and Air_firstIteration sub-benchmarks: https://treeherder.mozilla.org/perf.html#/comparesubtest?originalProject=mozilla-central&originalRevision=e09fbaee1456a373382d2d5bf6ab7321e26e3710&newProject=mozilla-central&newRevision=d231a32316809f8c9efa43ed6f74484ff552c115&originalSignature=94f6b5e5e2a169b5e5221589dddcaab3b2188f5f&newSignature=94f6b5e5e2a169b5e5221589dddcaab3b2188f5f&framework=1 Jan, based on the pushlog (https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=e09fbaee1456a373382d2d5bf6ab7321e26e3710&tochange=d231a32316809f8c9efa43ed6f74484ff552c115) it appears that your commit in bug 1466503 is the most likely cause of this regression. Could you investigate when you have a moment? Apologies if I am mistaken and/or this has already been noticed elsewhere. -- Talos has detected a Firefox performance regression from push: https://hg.mozilla.org/mozilla-central/pushloghtml?changeset=d231a32316809f8c9efa43ed6f74484ff552c115 As author of one of the patches included in that push, we need your help to address this regression. Regressions: 6% ARES6 linux64 pgo e10s stylo 59.06 -> 62.48 You can find links to graphs and comparison views for each of the above tests at: https://treeherder.mozilla.org/perf.html#/alerts?id=14205 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 Our wiki page outlines the common responses and expectations: https://wiki.mozilla.org/Buildbot/Talos/RegressionBugsHandling

(In reply to William Lachance (:wlach) (use needinfo!) from comment #0) > Jan, based on the pushlog > (https://hg.mozilla.org/mozilla-central/ > pushloghtml?fromchange=e09fbaee1456a373382d2d5bf6ab7321e26e3710&tochange=d231 > a32316809f8c9efa43ed6f74484ff552c115) it appears that your commit in bug > 1466503 is the most likely cause of this regression. Could you investigate > when you have a moment? Apologies if I am mistaken and/or this has already > been noticed elsewhere. It's unlikely; my patches in this range should be no-ops or minor improvements. Bug 1437600 is a more likely culprit IMO and already has some Talos regressions associated with it.