1633977 - 4.12 - 6.22% tart / ts_paint / ts_paint_webext (linux64-shippable-qr, windows10-64-shippable-qr) regression on push 20aad8c2fc424a4ef056386d3c54e18ca0c741d7 (Mon April 20 2020)

Status: RESOLVED WONTFIX

(Core :: Graphics: WebRender, defect)

Description

[Alexandru Ionescu (needinfo me) [:alexandrui]]

Perfherder has detected a Talos performance regression from push 20aad8c2fc424a4ef056386d3c54e18ca0c741d7. As author of one of the patches included in that push, we need your help to address this regression.

Regressions:

6% tart windows10-64-shippable-qr opt e10s stylo 2.69 -> 2.86

Details of the alert can be found in the alert summary, including links to graphs and comparisons for each of the affected tests. Please follow our guide to handling regression bugs and let us know your plans within 3 business days, or the offending patch(es) will be backed out in accordance with our regression policy.

For more information on performance sheriffing please see our FAQ.

Comment 1

[Timothy Nikkel (:tnikkel)]

Bug 1631312 changed code that is only compiled on Windows, so the two linux regressions seem mis-attributed.

Comment 2

[Alexandru Ionescu (needinfo me) [:alexandrui]]

Thanks for letting me know!

Comment 3

[Timothy Nikkel (:tnikkel)]

Two of the regression are linux. But one is Windows. That one is still valid.

Comment 4

[Alexandru Ionescu (needinfo me) [:alexandrui]]

Changed the status and cleared the needinfo by mistake.

Comment 5

[Jeff Muizelaar [:jrmuizel]]

This is the same regression as bug 1611800. We just accidentally disabled DirectComposition in bug 1630629 and bug 1631312 reenabled it.