http://build.chromium.org/f/chromium/perf/xp-release-dual-core/intl1/report.html?history=130&rev=103677 This appears to be caused by this Skia roll r2351:r2358: http://src.chromium.org/viewvc/chrome?view=rev&revision=103204
http://code.google.com/p/skia/source/list?num=7&start=2358
Maybe this change http://code.google.com/p/skia/source/detail?r=2358 ?
This is in process of being fixed/reversed.
> This is in process of being fixed/reversed. I'm concerned that Bug 67876 has been unresolved for upwards of a month. It's important that we not carry these regression in the tree because they mask other regressions. Do you have an estimate for when this issue will be resolved?
Should be fixed in latest skia DEPS roll.
> Should be fixed in latest skia DEPS roll. Thanks Mike. It looks on this graph that we've gotten most (if not all) of the performance back: http://build.chromium.org/f/chromium/perf/xp-release-dual-core/intl1/report.html?history=150&rev=103710 This improvement appears to have been cause by rolling Skia: http://src.chromium.org/viewvc/chrome?view=rev&revision=103704 Just to confirm before closing this bug: That improvement is the fix for the Sept 28 regression and not for the regression we're tracking in Bug 67876 ? (They are of a similar magnitude, which makes it hard for me to tell just from the graph.)
I think so. The recent regression was definitely due to 2358, which was (effectively) reverted.
Thanks for the quick response.