295027 - Marquee with resized images uses 99% CPU time

Status: RESOLVED WORKSFORME

(Core :: Layout, defect)

Description

[Daniel Machado Grilo]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050514 Firefox/1.0.3
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050514 Firefox/1.0.3

Any page with a Marquee with Images in it makes CPU Load grow to 75% or more.
The Images don't run as they were suposed to, they break once in a while.

Reproducible: Always

Steps to Reproduce:
1. open a page with images in a marquee tag
2.
3.

Actual Results:  
CPU Load up to 75%, and the Images don't run as they were suposed to, they break
once in a while.

Expected Results:  
CPU normal Load and marquee normal scroll with images.

Comment 1

[Steve England [:stevee]]

Attachment: reduced testcase

Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b2) Gecko/20050521
Firefox/1.0+ ID:2005052104

Sort of minimized testcase. Again, can't get it to validate because it uses
<marquee> so I don't know what doctype to use.

Anyway, the problem here isn't the fact that there are images in the marquee,
it's that the images inside the marquee are all resized with "width=120
height=120".

If you remove the "width=120 height=120" from the five pictures, they all
scroll fine with minimal CPU usage; so I guess the CPU cycles are being eaten
up by constantly resizing the images everytime the marquee is redrawn.

Comment 2

[Peter van der Woude [:Peter6]]

Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b2) Gecko/20050519
Firefox/1.0+ ID:2005051922

testcase WFM (low load)
url=100% mem usage

Comment 3

[Adam Guthrie]

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a5pre) Gecko/20070522 Minefield/3.0a5pre

This is WFM, too. ->WORKSFORME