1518406 - (picture-caching) Low fps on scrolling pages

Status: RESOLVED FIXED

(Core :: Graphics: WebRender, defect, P3)

Description

[Sotaro Ikeda [:sotaro]]

When I scrolled paged like https://bugzilla.mozilla.org/show_bug.cgi?id=1494775, fps was very low like 8fps on my laptop(P50 Win10).

Without picture caching, fps was 60fps.

Comment 1

[Glenn Watson [:gw]]

Potential fix / workaround is https://github.com/servo/webrender/pull/3487 - although I'd still like to see some WR profile graphs of this case, since the difference is very significant and I can't repro here.

Comment 2

[Jeff Muizelaar [:jrmuizel]]

Sotaro, can you still reproduce? If so can post WR profile graphs.

Comment 3

[Sotaro Ikeda [:sotaro]]

(In reply to Sotaro Ikeda [:sotaro] from comment #0)

When I scrolled paged like https://bugzilla.mozilla.org/show_bug.cgi?id=1494775, fps was very low like 8fps on my laptop(P50 Win10).

Without picture caching, fps was 60fps.

The low fps problem is addressed on the above Bugzilla page, but scrolling of https://www.yahoo.co.jp/ was still not smooth on my laptop(P50 Win10). The page was smooth without picture caching.

profile(with picture caching) is https://perfht.ml/2FIRAtj

Comment 4

[Sotaro Ikeda [:sotaro]]

I checked with latest nightly. fps was close to 60fps. It seems good to close it.