206708 - high CPU load on specific website

Status: RESOLVED INCOMPLETE

(Core Graveyard :: Image: Painting, defect)

Description

[odi]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4b) Gecko/20030507
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4b) Gecko/20030507

CPU load quickly changes from low to very highh (near 100%) slowing down the
whole system. Browser is frozen during high-load phases.

Reproducible: Always

Steps to Reproduce:
1. Load the given URL
2. watch task monitor

Actual Results:  
High CPU load.

Expected Results:  
Low CPU load.

Not sure if this is an actual browser bug or just stupid Javascript code. But IE
does not show a similar behaviour. So I guess it's the Javascript engine that
performs bad.

Comment 1

[Phil Schwartau]

Reassigning to Browser-General until we can get further information.
I'm not seeing this at all; the site loads fast, with normal CPU load.

I'm using Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.4b) Gecko/20030515
Machine: WinNT4.0(SP6), 128M RAM, 500 MHz CPU

Comment 2

[Jon Henry]

I can confirm that scrolling on this site will consume nearly 100% of the CPU on
the 20031006 nightly, Win 2000. This has to be a dupe of one of the other
slow-scrolling bugs, but I can't quite figure out which. It has a tiny
background image and uses no fixed-position elements. Perhaps bug 187822? I'm
sending this to ImageLib since that bug looks like the best culprit to me,
although I suppose it could be a layout issue. I apologize if this is the wrong
place.

Comment 3

[Ryuichi KUBUKI]

Over 70% CPU load on Athlon64 3500+.

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20060504 Minefield/3.0a1