Closed Bug 622829 Opened 14 years ago Closed 13 years ago

Very slow scrolling and high cpu use on this page in Minefield


(Core :: Web Painting, defect)

Not set



Tracking Status
blocking2.0 --- final+


(Reporter: pascalc, Unassigned)




(Keywords: regression, Whiteboard: [softblocker])

Mozilla/5.0 (X11; Linux i686; rv:2.0b9pre) Gecko/20110103 Firefox/4.0b9pre

1/ Visit

2/ scroll the page (keyboard or mouse)

expected result: smooth scroll
actual result: high cpu load and jerky scrolling

This is a regression as it works fine in Firefox 3.6, tested in a new profile.

Not sure I filed that bug in the right component.
Mozilla/5.0 (Windows NT 6.0; rv:2.0b9pre) Gecko/20110104 Firefox/4.0b9pre

Confirmed on Windows as well.

Hardware Accel Information:

        Direct2D Enabled

        DirectWrite Enabled

        GPU Accelerated Windows
        1/1 Direct3D 10
OS: Linux → All
Version: unspecified → Trunk
Component: Layout → Layout: View Rendering
QA Contact: layout → layout.view-rendering
Strange, on my linux machine I find it nice and snappy.
Trying without adblockplus I can see that it is slow, so must be something with the ads.
Something to do with scrolling plugins I'd guess
The first bad revision is:
changeset:   59491:e9f317c9ab52
user:        Robert O'Callahan <>
date:        Mon Dec 20 14:37:43 2010 +1300
summary:     Bug 617152. Part 8.5: Fire MozPaintWait even if the plugin layer is currently zero-size. r=tnikkel
Bug 619176 will probably fix this.
Blocks: 617152
Depends on: 619176
Is this fixed?
Whiteboard: [softblocker]
nope, unless the changes in Bug 619176 was not in today's nightly, I still have the bug with Mozilla/5.0 (X11; Linux i686; rv:2.0b10pre) Gecko/20110113 Firefox/4.0b10pre
Bug 619176 is not in todays nightly.
WFM without any problem with scrolling on my "slow" netbook.
Mozilla/5.0 (Windows NT 6.1; rv:2.0b10pre) Gecko/20110119 Firefox/4.0b10pre
I'm marking it fixed. Pascal can reopen if it's not fixed for him.
Closed: 13 years ago
Resolution: --- → FIXED
fixed for me as well now, thanks
Component: Layout: View Rendering → Layout: Web Painting
You need to log in before you can comment on or make changes to this bug.