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#1802 closed bug (fixed)

Opened October 15, 2007 04:39AM UTC

Closed April 28, 2008 09:15PM UTC

Last modified October 14, 2008 10:32AM UTC

"mousemove" consumes lots of CPU time in Firefox

Reported by: aza Owned by:
Priority: major Milestone: 1.2.4
Component: event Version: 1.2.1
Keywords: Cc:
Blocked by: Blocking:

Go to the the following page:

It has a global "mousemove" event. Move the mouse back and forth on the page while watching the CPU consumption of Firefox -- it will shoot up to near 100% consumption. This behavior occurs on any page that "mousemove" is used. The same page in Safari or IE does not exhibit the unwanted behavior.

At least on my system, this causes the mouse to jump around and the browser to stop being responsive.

I am using Firefox

Attachments (0)
Change History (4)

Changed November 06, 2007 04:23AM UTC by Bradley comment:1

priority: criticalmajor

I am only seeing 10-15% cpu usage in FF when moving the mouse. Intel C2D 2.16

Can anyone else verify the issue? This seems minor at best to me, but could be affecting slower systems. Need additional review.

Changed November 14, 2007 05:12AM UTC by brandon comment:2

#1871 is related to this

Changed April 28, 2008 09:15PM UTC by brandon comment:3

resolution: → fixed
status: newclosed

This should be addressed in Rev. [5344].

Changed May 13, 2008 05:44PM UTC by flesler comment:4