594197 - Tab Switching with Firefox 4 Beta 5 is slow

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect)

Description

[Rick]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b4) Gecko/20100818 Firefox/4.0b4
Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b4) Gecko/20100818 Firefox/4.0b4

Hi, 

Firefox 4 Beta 5 is release today, but it's slow while switching tabs, please try to open more than 5 tabs, and click on those tabs , it doesn't immediately switch like beta 4 version.

Another thing, Beta5 takes too much CPU resource on task manager but beta4 didn't.

Please fix, i love FF

Reproducible: Always

Steps to Reproduce:
1. Open more than 5 tabs FF beta5, 
2. click between those tab,and watching task manager.
3. notice: CPU resource increase whiule clicking tabs, and tabs doesn't reponds immediately like beta4
Actual Results:  
Tab focus slower than beta4, CPU increase alot while running beta5 but not on beta4

Expected Results:  
atleast tab focus while switching is fast as beta4

Please fix, i love FF

Comment 1

[(mostly gone) XtC4UaLL [:xtc4uall]]

Is your Issue reproduceable Extension-less in Safe-Mode and/or using a new Profile?
https://support.mozilla.com/en-US/kb/Safe+Mode
https://support.mozilla.com/en-US/kb/Managing+profiles#Creating_a_profile

Comment 2

[(mostly gone) XtC4UaLL [:xtc4uall]]

Forgot to ask:
Does disabling Hardware Acceleration under Options/Advanced help?

Comment 3

[Rick]

Hi, 

it does help when disabling Hardware Acceleration under Options/Advanced help, tab focus is faster , not delay 1-2sec anymore..

but somehow, the CPU ussage is still higher than beta4, on beta 5 is go up to 14-17 , but on beta4, it only goes up to 8-9 while clicking between tabs

Comment 4

[(mostly gone) XtC4UaLL [:xtc4uall]]

Can you post your Graphics Info from about:support (Help/Troubleshooting Info)?

Comment 5

[Carlos Roberto]

Mozilla/5.0 (Windows NT 5.1; rv:2.0b6pre) Gecko/20100910 Firefox/4.0b6pre

I was getting same problem on beta 3 or 4, but I cannot reproduce it in the beta 6pre.

Comment 6

[Hunyady Márton]

I also have this problem. I use beta6pre, but it was a problem in previous trunk releases too. It's a problem with a new profile too, and with disabled hardware acceleration too.

Mozilla/5.0 (Windows NT 6.1; rv:2.0b6pre) Gecko/20100910 Firefox/4.0b6pre

Graphic informations from about:support:

Adapter Description: ATI RADEON 9600 Series (Microsoft Corporation - WDDM) 
Vendor ID: 1002
Device ID: 4150
Driver Version: 8.56.1.15
Driver Date: 4-24-2009
Direct2D Enabled: false
DirectWrite Enabled: false
GPU Accelerated Layers Enabled: 0/1

Comment 7

[Timothy Nikkel (:tnikkel)]

Can people who see this try a 2010-09-12 nightly or newer and report back?

Comment 8

[Hunyady Márton]

I still have the problem.

Mozilla/5.0 (Windows NT 6.1; rv:2.0b6pre) Gecko/20100912 Firefox/4.0b6pre

Comment 9

[Boris Zbarsky [:bzbarsky]]

> but it was a problem in previous trunk releases too. 

Hunyady, if it was a problem in Firefox 4 beta 4 for you, then you're not seeing this bug.  This bug is specifically about a regression that happened after beta 4.

Please do file a separate bug on your problem, mention the bug number here or just cc me, and indicate in that separate bug when the issue you see appeared.

Comment 10

[Hunyady Márton]

I filed Bug 595927.

Comment 11

[Mike Beltzner [:beltzner, not reading bugmail]]

How is that different from this bug?

Comment 13

[Joe Drew (not getting mail)]

It seems that most people do not have issues with hardware acceleration causing slow tab switching any more; please reopen if that's not the case.

Comment 14

[Timothy Nikkel (:tnikkel)]

Mike, I know you were profiling this on the weekend, are you still seeing this?