Bug 770121

Summary:	Intermittent pauses in Firefox 9
Product:	[Fedora] Fedora	Reporter:	Stephen So <steve8988>
Component:	firefox	Assignee:	Martin Stransky <stransky>
Status:	CLOSED WORKSFORME	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	16	CC:	gecko-bugs-nobody, stransky
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-02-14 13:28:17 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Stephen So 2011-12-23 13:13:04 UTC

Description of problem:

There seems to be a very pronounced pausing (of about 1 second) in the Firefox 9 GUI and it affects everything from typing in a text field to interacting with the tabs, etc.  

It is seems to be related to the sessionstore section of Firefox, since increasing the browser.sessionstore.interval delays the occurrence of pauses, while decreasing it makes them more common.

I do recognise that on first impression this is probably isn't a bug since there are numerous web articles that advise increasing this value to prevent jerkiness, but I want to stress that this wasn't that noticeable in Firefox 8 or prior versions. But it is very noticeable in version 9 (1 second long pauses).

Version-Release number of selected component (if applicable):

firefox-9.0.1-1.fc16.x86_64

How reproducible:

Always

Steps to Reproduce:
1. Open up Firefox and type or use the tab interface
  
Actual results:

The interface pauses every few seconds for about 1 second

Expected results:

The experience should be relatively smooth

Additional info:

Comment 1 Martin Stransky 2012-02-13 16:04:18 UTC

Can you reproduce it with Firefox 10?

Comment 2 Stephen So 2012-02-14 01:17:50 UTC

I managed to solve the problem in Firefox 9 by deleting the sessionstore.js and sessionstore.bak files, which was suggested on some webpage I found via google.  I think they got really large.

Comment 3 Martin Stransky 2012-02-14 13:28:17 UTC

I see, okay.