Ubuntu
firefox package

  1. Bug #16465
  2. Comment #27

Comment 27 for bug 16465

Revision history for this message
Igor Levicki (levicki-i) wrote :

For me this page gives constant 50% CPU load and rising memory usage for Firefox 3 release version under Windows XP x64 SP2:

http://www.theinquirer.net/gb/inquirer/news/2008/07/09/nvidia-g84-g86-bad

I have dual-core CPU and Windows scheduler seems to be bouncing the thread around so that my whole system becomes unresponsible, not just Firefox. On some pages I have observed Firefox process eating 700+ MB of RAM (and increasing) when this high CPU load happens.

If I lock the process to one of the cores, then the system responsiveness improves, but Firefox is still sluggish.

When I check with Process Explorer, the IP of a thread consuming CPU time is inside js3250.dll address space or sometimes in xul.dll. When it is inside of js3250.dll stack trace also includes xul.dll.

On one of the pages I have narrowed the problem down to the feedburner.com -- if I block *.feedburner.com using adblock, and reload the page the problem disappears.

I believe it is a JavaScript related bug.