286900 - [DHTML] CPU usage reach 100%

Status: RESOLVED DUPLICATE of bug 137584

(Core :: Layout, defect)

Description

[Usama Nassir]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.6) Gecko/20050302 Firefox/1.0.1 Fedora/1.0.1-1.3.2
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.6) Gecko/20050302 Firefox/1.0.1 Fedora/1.0.1-1.3.2

When browsing to http://www.ynetnews.com/ the CPU usage reach 100%.
This happens with mozzila and firefox.
Testes on Linux FC3 and windows XP.

With Internet explorer the CPU usage reachs 2%-5%

Reproducible: Always

Steps to Reproduce:
1.browse to http://www.ynetnews.com/
2. Make sure that javascript is enabled
3.

Actual Results:  
CPU usage reaches 100%

Expected Results:  
Normal CPU usage

The problem seems to be in the Update fram in the site.

Comment 1

[simon annear]

This doesn't happen for me with Mozilla (1.8b) on Linux (JDS R2) - but I don't
have the shockwave plugin loaded - is it possible that this is causing it, or
another part of the page that has not yet loaded

Comment 2

[simon annear]

Tried with Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b2)
Gecko/20050316 on windows XP

and 1.8b (20050302) on Linux JDS R2 (this time with flashplayer plugin).

Am currently unable to reproduce this problem

Reporter - are you able to try again and cofirm that the problem still exists -
perhaps after a restart of Mozilla / Firefox.

Have changed OS to all, as reporter tested with Windows and Linux

Comment 3

[Usama Nassir]

Attachment: The problimatic frame

I have tested it today with firefox 1.0.1 under FC3 and the cpu usage by
firefox-bin is ~ 80%
Can you see the updates frame (up left on the page)?
Is the news in the updates frame changing?
It is enogh to open this frame in order to reach the high CPU usage. 
Is javasript enabled?
With ie6 + wine the total CPU usage was ~ 20%


I attached the problitic frame to the bug report.

Comment 4

[Andrew Schultz]

over to layout

Comment 5

[Markus Hübner]

Using Mozilla trunk 2005031906 on winxp pro sp2 I get 55% on average cpu usage.
Scrolling behaves exactly as MSIE6 does.

Comment 6

[Boris Zbarsky [:bzbarsky]]

Dup of other bugs we already have on this -- profile is showing nothing unusual
that we don't already have bugs filed on.

Comment 7

[Gérard Talbot]

This is a DHTML marquee.
IMO, this is a DUPLICATE of bug 137584.

Usama, there is a good, entirely web-standards valid and reasonable-for-cpu
alternative to the code used in the testcase available here:

http://devedge-temp.mozilla.org/toolbox/examples/2002/xb/xbMarquee/examples/ch-js-loader.html
which comes from the page
http://devedge-temp.mozilla.org/toolbox/examples/2002/xb/xbMarquee/index_en.html#Examples

If you know the people at ynetnews.com or can contact them, then you can notify
they can improve their webpage considerably by studying the examples at the
provided links.
Their webpage would also need a clean up (valid markup code and valid CSS code -
lots of parsing errors)

*** This bug has been marked as a duplicate of 137584 ***