1588205 - Investigate ~22% regression on tabpaint Talos test on Windows shippable with Fission enabled

Status: RESOLVED INCOMPLETE

(Firefox :: Tabbed Browser, task, P3)

Description

[Mike Conley (:mconley) (:⚙️)]

https://treeherder.mozilla.org/perf.html#/compare?originalProject=try&originalRevision=a4ba67a3711b4b685d7f393b934d754a60b6b8b5&newProject=try&newRevision=cf0c84e280b820453f7495e1d3a9cb4a06a346e6&framework=1

Comment 1

[Mike Conley (:mconley) (:⚙️)]

Try push with both modes and profiles: https://treeherder.mozilla.org/#/jobs?repo=try&revision=db25fc81854ceb4567d55a22044f7083bbe13255

Comment 2

[Mike Conley (:mconley) (:⚙️)]

The thing that jumps out to me the most is that for some reason, the "bad" case, with Fission enabled, seems to have another content process just lying around doing nothing. Going to try to figure out why.

Comment 3

[Mike Conley (:mconley) (:⚙️)]

Huh. This regression appears to have disappeared now: https://treeherder.mozilla.org/perf.html#/compare?originalProject=try&originalRevision=34c65c4350033777b5aabf73e0e2ba03f7caaba5&newProject=try&newRevision=a364fab3f94a5369e318d3fdf7481d981e990237&framework=1