583038 - Scrolling gmail is slow on OS X

Status: RESOLVED DUPLICATE of bug 579260

(Core :: Layout, defect)

Description

[Jeff Muizelaar [:jrmuizel]]

We are spending 10% of the time in nsIFrame::GetOffsetToCrossDoc()
and overall it seems like we're doing more than we should be.

Comment 1

[Boris Zbarsky [:bzbarsky]]

What's the stack to that?  Invalidation, or something else?

Comment 2

[Jeff Muizelaar [:jrmuizel]]

nsDisplayList::ComputeVisibilty called by nsLayoutUtils::PaintFrame()

Comment 3

[Timothy Nikkel (:tnikkel)]

There is an existing bug for scrolling on gmail being slow as a regression from retained layers, that's bug 579260.

Jeff, would you be willing to reprofile if I gave you a patch to try?

Comment 4

[Jeff Muizelaar [:jrmuizel]]

(In reply to comment #3)
> There is an existing bug for scrolling on gmail being slow as a regression from
> retained layers, that's bug 579260.
> 
> Jeff, would you be willing to reprofile if I gave you a patch to try?

Yes, but I won't probably won't get a chance till Monday

Comment 5

[Timothy Nikkel (:tnikkel)]

Attachment: patch to try

This undo's some changes that were made in bug 563878. I'm interested in how this affects the GetOffsetToCrossDoc time.

Comment 6

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

I believe the problem in gmail scrolling is that we're painting much too much, not that any one function is slow.