819668 - css animations performance issue

Status: UNCONFIRMED

(Core :: CSS Parsing and Computation, defect)

Description

[ryanwoo]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11

Steps to reproduce:

Today I was going to make couples of keyframe animations using CSS, big problem come to me


Actual results:

The cpu usage is too high almost 99%, on css keyframe animation, look at http://hkwh01.99k.org/test/services.html 
you will understand. Comparing to safari , it take too much resources. 


Expected results:

You should fix the bug.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Presumably needs OMTC?

Bogdan, you want to attach testcases to bugs when you move them like that...

Comment 2

[Boris Zbarsky [:bzbarsky]]

Attachment: Image 1

Comment 3

[Boris Zbarsky [:bzbarsky]]

Attachment: Image 2

Comment 4

[Boris Zbarsky [:bzbarsky]]

Attachment: Testcase

Comment 5

[Paul Silaghi, QA [:pauly]]

Mac OS X 10.8.2
FF 20 2013-02-19 - CPU usage ~60%
Safari - CPU usage 20%