402547 - Firefox process running at 50% when running Folding@Home

Status: RESOLVED INCOMPLETE

(Firefox :: Shell Integration, defect)

Description

[Timothy Swett]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a9pre) Gecko/2007110505 Minefield/3.0a9pre
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a9pre) Gecko/2007110505 Minefield/3.0a9pre

When running Folding@home at the same time I run Firefox (2.0.0.9 or latest build of 3), Firefox process starts running up to 50% (Folding@Home uses 50% processor power.) When I pause the work on Folding@Home, the processor usage of Firefox goes down to a moderate 5% or so, fluctuating between 0%-5%/10%.  

Reproducible: Always

Steps to Reproduce:
1.Run Folding@Home from Stanford University
2.Open Firefox to a webpage (i.e. www.google.com/ig or www.digg.com)
3.Look at CPU Usage of both applications (Folding@home should be 50%, Firefox will fluctuate between 40%-50%
4.Pause work on Folding@Home
5.Look at CPU Usage of both applications
Actual Results:  
After pausing work from folding@home, Firefox's CPU usage dropped significantly.

Expected Results:  
See above.

about:buildconfig

Build platform
target
i686-pc-mingw32

Build tools
Compiler 	Version 	Compiler flags
cl 	14.00.50727 	-TC -nologo -W3 -Gy -Fd$(PDBFILE)
cl 	14.00.50727 	-GR- -TP -nologo -Zc:wchar_t- -W3 -Gy -Fd$(PDBFILE)

Configure arguments
--enable-application=browser --enable-update-channel=nightly --enable-optimize --disable-debug --disable-tests --enable-update-packaging

Comment 1

[Tyler Downer [He/Him]]

Does this happen with firefox 4 or later with a fresh profile?
http://support.mozilla.com/kb/Managing+profiles

Comment 2

[Robert Strong (they/them - no direct email)]

This was filed in the incorrect component anyways so resolving -> incomplete. If this is still happening please reopen and move to Firefox -> General for further triage