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.
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.