launchpad takes 100% CPU in Xorg during scroll

Bug #748087 reported by Mike
12
This bug affects 2 people
Affects Status Importance Assigned to Milestone
Mozilla Firefox
Confirmed
Undecided
Unassigned

Bug Description

I'm sure this must be a dup since I've seen this behavior for a couple years now, but searches aren't finding similar reports.
The problem is that when I visit Launchpad in Firefox on my MacBook 6,2 (4 CPUs @2.67GHz, 3.7 GB RAM, .07 typical load,) my CPU usage jumps to 100% when I try to scroll the pages. See attached screenshot. All the peaks in that image are me simply scrolling up and down on a not-so-big page. Here's a typical example of a page that causes 100% CPU utilization when I attempt to scroll up and down:
https://bugs.launchpad.net/midori/+bug/706908

It was the same in FF 3.x with Ubuntu 10.04, 10.10, and now with FF 4.0 on Natty 11.04 A3

Revision history for this message
Mike (bild85) wrote :
Curtis Hovey (sinzui)
affects: launchpad → firefox
Revision history for this message
Mike (bild85) wrote :

I'm not sure this is a Firefox-specific problem. I am sure that bugs.launchpad.net is the only page I've noticed that behaves this way.

Revision history for this message
Ralph Corderoy (ralph-inputplus) wrote :

See bug #744808 for an explanation of what Firefox finds particular difficult about some *.launchpad.net sites; bugs isn't the only one. Perhaps Firefox can improve its performance of such big-in-one-direction sprite images.

Changed in firefox:
status: New → Confirmed
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