Bug 810642

Summary:	Runfield demo is getting stuck, WebKit works
Product:	[Fedora] Fedora	Reporter:	Jan Kratochvil <jan.kratochvil>
Component:	firefox	Assignee:	Jan Horak <jhorak>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	low	Docs Contact:
Priority:	unspecified
Version:	16	CC:	gecko-bugs-nobody, jan.kratochvil, jhorak
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	firefox-12.0-1.fc16.x86_64	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-04-30 07:30:12 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Jan Kratochvil 2012-04-07 15:26:11 UTC

Description of problem:
Found JavaScript Runfield demo - it works great in WebKit but it is not playable in Firefox.

Version-Release number of selected component (if applicable):
firefox-11.0-1.fc16.x86_64
xulrunner-11.0-3.fc16.x86_64

How reproducible:
Always.

Steps to Reproduce:
http://www.mozilla.org/en-US/firefox/features/
->
http://mozillademos.org/demos/runfield/demo.html
Jump over holes.

Actual results:
On almost each jump it gets stuck for about 0.5sec, the game is not playable.

Expected results:
Normal playable game like in:
epiphany-3.2.1-3.fc16.x86_64
webkitgtk3-1.6.1-1.fc16.x86_64

Additional info:
xorg-x11-server-Xorg-1.11.4-3.fc16.x86_64
xorg-x11-drv-intel-2.17.0-8.fc16.x86_64
00:02.0 0300: 8086:0126 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

Comment 1 Jan Horak 2012-04-10 11:02:22 UTC

I can reproduce. This seems to be related to sound. If I turn sound/music off I don't see this problem anymore.

Comment 2 Jan Kratochvil 2012-04-17 21:36:33 UTC

Much better visible is WebKit<->Gecko slowness in another HTML5 game:
http://www.adityaravishankar.com/projects/games/command-and-conquer/

Comment 3 Jan Horak 2012-04-25 14:33:00 UTC

Upstream bug: https://bugzilla.mozilla.org/show_bug.cgi?id=743972

Comment 4 Jan Kratochvil 2012-04-30 07:30:12 UTC

Maybe it is not yet perfect but with Firefox 12 the major performance issue is gone, the Comment 2 demo also works fine now.

Comment 5 Jan Horak 2012-05-03 11:57:07 UTC

Okay, I can see significant improvement too. I think we can close it as current release. Feel free to reopen if reoccurs.