366054 - Firefox has become a processor hog since v1.5.0.8

Status: RESOLVED INCOMPLETE

(Firefox :: General, defect)

Description

[levisa]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1 Driver4FoBo.ru/0.0.0.4
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1 Driver4FoBo.ru/0.0.0.4

Firefox is using so many processor cycles that I can type faster than the text can appear on the screen. The only process with a higher CPU priority is the system idle process (CPU priority = 48-50) vs firefox (CPU priority = 42-47). The processor usage is 48-52% while filling out this form with only this tab open. It is using 157K of memory and 115 user objects.

Reproducible: Always

Steps to Reproduce:
1.Open firefox, then open 5 tabs to various URLs (irrelevant which ones)
2.Open a new window and open more tabs until system slows down.
3.Close tabs and extra window. System does not recover.
Actual Results:  
System remains slow even though there is only one window/one tab open at home page [URL=http://www.google.com/firefox?client=firefox-a&rls=org.mozilla:en-US:official]

Expected Results:  
After returning firefox to one tab with home page, system should have performed at the same speed it was operating at when firefox was first opened.

I use the basic firefox app with 25 extensions, all up to date. I am running firefox on a Gateway computer with a Pentium 4 CPU at 3.40 GHz, 2GB of RAM, 1.25 TB of hard drive storage, broadband Internet access and my OS is Windows XP 2002 SP2 with all Microsoft updates except for their Genuine Advantage and IE7.

about:buildconfig

Build platform
target
i586-pc-msvc

Build tools
Compiler 	Version 	Compiler flags
$(CYGWIN_WRAPPER) cl 	12.00.8804 	-TC -nologo -W3 -Gy -Fd$(PDBFILE)
$(CYGWIN_WRAPPER) cl 	12.00.8804 	-TP -nologo -W3 -Gy -Fd$(PDBFILE)

Configure arguments
--enable-application=browser --enable-update-channel=release --enable-optimize --disable-debug --disable-tests --enable-static --disable-shared --enable-official-branding --enable-svg --enable-canvas --enable-update-packaging

Comment 1

[Ria Klaassen (not reading all bugmail)]

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1

I didn't test the build you're using because it's an older version, but with Firefox 2.0x (www.mozilla.com) I get quite reasonable results, no excessive memory or processor use after closing all tabs and windows except one. The amount and kind of extensions can also make difference.

Comment 2

[(mostly gone) XtC4UaLL [:xtc4uall]]

to op: please try to repro after following the hints listed here:

http://kb.mozillazine.org/Safe_mode
http://kb.mozillazine.org/Firefox_hangs
http://kb.mozillazine.org/Firefox_CPU_usage

Comment 3

[Wayne Mery (:wsmwk)]

If you still see this problem with v3.1 or 3.0 please comment.
 v3.1 http://www.mozilla.com/en-US/firefox/all-beta.html

Since there is no response to comment 1, => incomplete