264438 - 100% cpu with javascript on

Status: RESOLVED WORKSFORME

(Core :: JavaScript Engine, defect)

Description

[Marcos Pinto]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; rv:1.7.3) Gecko/20041003 Firefox/0.10.1
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; rv:1.7.3) Gecko/20041003 Firefox/0.10.1

visit http://www.msnbc.msn.com/id/6249895/  and wait for page to load.  after
the page is loaded (it *is* properly rendered), the cpu shoots up to 100%.  i'm
on an AMD64 3500+ with 1GB RAM with nothing running in the backgroup.  'top'
shows that firefox is the culprit.  

Reproducible: Always
Steps to Reproduce:
1. visit site
2. wait it to load
3. be forced to close firefox or switch sites to reduce cpu utilization of 100%

Actual Results:  
be forced to close firefox or switch sites to reduce cpu utilization of 100%

Expected Results:  
not suck up every system resource after page is loaded.  

bug duplicated on Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; rv:1.7.3)
Gecko/20040913 Firefox/0.10.1

Comment 1

[Ben Fowler]

Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8a5) Gecko/20041017
Firefox/0.9.1+

I am seeing the same thing.

Site uses Shockwave.

I got these messages:

JavaScript error: chrome://browser/content/browser.js, line 478: isBidiEnabled
is not defined
JavaScript error: http://www.msnbc.msn.com/id/6249895/, line 2: logoImg is not
defined
WARNING: PresShell::EndLoad(nsIDocument *) RootScrollFrame is not scrollable?,
file ../../../../../src/layout/html/base/src/nsPresShell.cpp, line 3541
WARNING: nsIFrame::FinishAndStoreOverflow(nsRect*, nsSize) Computed overflow
area must contain frame bounds, file
../../../../../src/layout/html/base/src/nsFrame.cpp, line 4241

Comment 2

[Boris Zbarsky [:bzbarsky]]

Is this an issue if Flash is disabled?  That is, is it Firefox sucking up CPU,
or the Flash plugin?

Comment 3

[Marcos Pinto]

this happens to me even without the flash plugin installed.  it is firefox
that's the problem

Comment 4

[Marcos Pinto]

note that even though i can duplicate this on mac osx and linux (with and
without flash), i *cant* duplicate it in windows.  

Comment 5

[Vesa Piittinen]

Mozilla/5.0 (Windows; U; Windows NT 5.1; fi-FI; rv:1.7.5) Gecko/20041108 Firefox/1.0

Duplicated this bug, clicked the link and I got 100% usage. Windows XP Finnish.
The bug disappeared when I disabled JavaScript, so it is in JavaScript as partly
guessed in the first comment.

Comment 6

[Ryuichi KUBUKI]

Confirming on Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b2)
Gecko/20050414 Firefox/1.0+

Comment 7

[Geir Aalberg]

This happens regularly for me both on Windows 2000 (Firefox 1.0.2) and on Mac OS
X (Firefox 1.0?). Neither have Flash installed or Java enabled. RAM is not an
issue (1.5 GB on the Mac). It freezes for about 20-30 seconds. On the Mac it
then comes alive for 1-2 secs, then freezes again for another 30 secs (on the PC
it is constantly frozen while the page fault count is galloping upwards). It
even happens when the computer has been idle for several minutes!

Comment 8

[jac]

It's not being reproduced on my system

Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.7.8) Gecko/20050511 Firefox/1.0.4

The page loads a little slowly, but that's probably because it's so full of
junk. There's no hanging or anything like that. I have flash installed and
javascript enabled.

Comment 9

[Bob Clary [:bc] (inactive)]

1.7.x is end of life and the original reporter's page is 404. if you can still reproduce this with a recent 1.8 or 1.9 build please file a new bug. -> WFM.