528604 - Gmail scrolls really badly with a chat window open

Status: RESOLVED WORKSFORME

(Core :: Layout, defect)

Description

[Jeff Muizelaar [:jrmuizel]]

Opening a chat window makes scrolling really bad. It feels like we are repainting the entire page on scroll. It feels like the buddy list iframe is causing problems.

Comment 1

[Jeff Muizelaar [:jrmuizel]]

This problem shows up really badly on linux. But even on OS X, scrolling seems to get quite a bit slower.

Comment 2

[(no longer active)]

But the scrolling performance degrades visibly even without the buddy list iframe, having that open just makes things much worse.

Comment 3

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Yes, we're repainting the whole window when the chat window is open. It's probably something to do with the region complexity limiter. I'll look into it.

Comment 4

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Attachment: fix

Comment 5

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Comment on attachment 412522 [details] [diff] [review]
fix

r=dbaron

Comment 6

[Robert O'Callahan (:roc) (email my personal email if necessary)]

http://hg.mozilla.org/mozilla-central/rev/163fd6aa31df

Comment 7

[Robert O'Callahan (:roc) (email my personal email if necessary)]

http://hg.mozilla.org/releases/mozilla-1.9.2/rev/2a071d20f2d6

Comment 8

[Mike Shaver (:shaver emeritus)]

Per Jeff, reopening.  Opening a couple of gtalk internal-windows noticably degrades my gmail scrolling experience.

Mozilla/5.0 (Windows; U; Windows NT 6.1; WOW64; en-US; rv:1.9.3a5pre) Gecko/20100505 Minefield/3.7a5pre

Intel graphics, D2D doesn't seem to make a difference.

Comment 9

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Retest after 564991 lands

Comment 10

[Ryan Jones-Ward [:sciguyryan]]

With the latest hourly builds and retained layers enabled there seems to be no degradation of scrolling performance. This bug seems fixed.

Comment 11

[Wayne Mery (:wsmwk)]

jeff, do you agree?

(In reply to Ryan Jones from comment #10)
> With the latest hourly builds and retained layers enabled there seems to be
> no degradation of scrolling performance. This bug seems fixed.