278614 - Animated GIF causes excessive CPU load

Status: RESOLVED DUPLICATE of bug 255648

(Core :: Graphics: ImageLib, defect)

Description

[Greg]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0

Attached is a small animated GIF which causes nearly triple the CPU load
whenever it's on a page (even loaded seperately) in Firefox 1.0.


Reproducible: Always

Steps to Reproduce:
1.Examine CPU usage
2.Open attached file "optn=1.gif" in Firefox
3.Repeat step 1

Actual Results:  
CPU usage rises dramatically when the file is displayed

Expected Results:  
Nothing unusual

Sorry, but I am unable to d/l a current build to check if this has been fixed.
I thought you might find the .gif file useful.

Comment 1

[Greg]

Attachment: small animated GIF file

Comment 2

[Andrew Brock]

I can't confirm this, the attachement sits on 0% CPU usage for me

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041108 Firefox/1.0

Comment 3

[Marius Strumyla]

Same here. 0-1% CPU usage.
Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0

Reporter, post some info about your graphics card and drivers. Also, you might
try updating them.

Comment 4

[Boris Zbarsky [:bzbarsky]]

Matic, are you actually seeing the bug?

This worksforme too -- 0% CPU with a current Linux trunk build.

Comment 5

[ArronM (:paper)]

Mozilla 2005012606:  ~20% CPU
IE 6              :    0%
Opera 7           :    8% CPU

Athlon XP 2500+/Win2k/nVidea FX5500

Comment 6

[Hiro]

Reproduce.
40-50% CPU usage.

Windows XP SP1
Pen4 2G Hz
nVIDIA GeForce2 MX 100/200
Mozilla/5.0 (Windows; U; Windows NT 5.1; ja-JP; rv:1.8b) Gecko/20050202 Firefox/1.0+

Comment 7

[Marius Strumyla]

Fyi, my 4y old configuration: PIII~650Mhz/Win2k/Matrox Millenium G400
Cannot reproduce the bug.

Comment 8

[Greg]

(In reply to comment #7)
> Fyi, my 4y old configuration: PIII~650Mhz/Win2k/Matrox Millenium G400
> Cannot reproduce the bug.

(In reply to comment #3)
> Same here. 0-1% CPU usage.
> Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.5) Gecko/20041107
Firefox/1.0
> 
> Reporter, post some info about your graphics card and drivers. Also, you might
> try updating them.

Win2k, PIII mobile w/ 256m & nVidia GeForce 2 mobile

All the reproducers seem to have nVidia graphics chips...

Comment 9

[Marius Strumyla]

Attachment: small animaged gif (w/o transparency)

Greg, I've modified the animated image. I removed the transparency from both
frames. Is your CPU still pegging? 

It is probably a dup of bug 260676. This animate image also has 256 colors.

Comment 10

[Greg]

(In reply to comment #9)
> Created an attachment (id=174045) [edit]
> small animaged gif (w/o transparency)
> 
> Greg, I've modified the animated image. I removed the transparency from both
> frames. Is your CPU still pegging? 
> 
> It is probably a dup of bug 260676. This animate image also has 256 colors.

Nope, the non-transparent version works fine. Think you're right, it's the same
bug w/ nVidia drivers & transparent drawing.

Comment 11

[ArronM (:paper)]

*** This bug has been marked as a duplicate of 255648 ***