255525 - cpu usage of browser suddenly rises up to 100%

Status: RESOLVED DUPLICATE of bug 246974

(Firefox :: General, defect)

Description

[christian]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040707 Firefox/0.9.2
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040707 Firefox/0.9.2

having open several browser, the ussage of the cpu by the browser is rising up
to nearly 100% without any obvious reason.
it doesn't depent on the page viewed because it happend several times with
several pages that were not always the same.
sometimes the usage normalises or the browser crashes.

Reproducible: Always
Steps to Reproduce:
1.start several browser
2.brows to several pages
3.just surf arround

Actual Results:  
sometimes the browser increases its cpu usage and crashes sometimes and
sometimes not

Expected Results:  
the cpu usage shouldn't be at top level all the time

Comment 1

[Martin Dougiamas]

I'm seeing the same thing happening about once an hour or two using Mozilla
1.7.2 on Win XP (except my CU goes hard to 50% because I have a P4 with
Hyperthreading)

It usually goes away by itself after a few minutes and Mozilla becomes fast again.

I cannnot identify a single activity that causes it, but it usually seems to be
while I'm typing in a textarea (probably coincidence because I usually am).

I've totally rebuilt my profile fram scratch, and uninstalled all Mozilla
products and reinstalled - no improvement.  I've tried 1.8 nightlies, etc, no
luck.  I installed XP SP2, no change.

Comment 2

[Nickolay_Ponomarev]

*** This bug has been marked as a duplicate of 246974 ***