488186 - typing in textarea is really slow on a large page that's zoomed smaller

Status: RESOLVED DUPLICATE of bug 479852

(Core :: Graphics, defect)

Description

[Mike Beltzner [:beltzner, not reading bugmail]]

On branch nighlty ...

STR:

1. Go to bug 482928
2. Hit Ctrl/Cmd+- twice to make the text smaller
3. Try typing

Expected: typing as normal
Actual: CPU spikes, typing responsiveness isn't so great

Johnath has a Shark profile, Jeff tells me this might already be fixed on branch.

Comment 1

[Jeff Muizelaar [:jrmuizel]]

My guess is that this might be: 479852

Comment 2

[Johnathan Nightingale [:johnath]]

* Jeff tells me this might already be fixed on *trunk* by 479852

I see it too, but only when zoomed, as beltzner says.  Shark in heavy mode puts 41% of the blame in argb32_mark_pixelshape.

Shark also produces a file that's too big to attach here - sent a copy to jrmuizel though, just in case.

Comment 3

[Jeff Muizelaar [:jrmuizel]]

I can not reproduce this on a trunk build that should include the fix for bug 479852