243143 - (gif-cpukiller) [auto image resizing] High CPU when viewing animated GIF image

Status: VERIFIED WORKSFORME

(Core :: Layout: Images, Video, and HTML Frames, defect)

Description

[Pier Luc Petitclerc]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6) Gecko/20040206 Firefox/0.8
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.6) Gecko/20040206 Firefox/0.8

Really, really weird stuff. I've come across few animated images (GIFs) and
noticed a dramatically high CPU usage when viewing those. This just happened
again and i thought i'd file a bug. Check out the URL i submitted for one of the
images that makes my CPU go through the roof. I will provide more details to
whoever asks them, i'm just not sure what to say.

Reproducible: Always
Steps to Reproduce:
1. Go the the submitted URL
2. Look at the image
3. Look at your CPU usage (Tested with TaskInfo and WinXP Task Manager)

Actual Results:  
CPU was being used 100% by Firefox

Expected Results:  
Nothing, that's the problem.

Computer info, if it's useful to anyone:

Processor: Intel P4 @ 2.67GHz (Not overclocked)
RAM: 1Gb DDR (Two DIMMS)
OS: Windows XP Professional with all updates to date.
Video Card: nVidia GeForce FX 5600 with latest drives (56.72)

Currently installed Firefox extensions:
RSS Reader Panel 1.7
Firesomething 1.1.2
Download Manager Tweak
Web Developer 0.7
IE View 0.7
Googlebar 0.8.0.22
CuteMenus 0.3
SpiderZilla
Tabbrowser Preferences

Comment 1

[Bernard Alleysson]

WFM Windows 2003 (Athlon 1700)
please test with a recent nightly, your build is too old, thanks

Comment 2

[José Jeria]

WFM: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a) Gecko/20040509
Firefox/0.8.0+

Marking as WORKSFORME, only reopen if you can reproduce this with a new/nightly
build and a fresh profile. 

Comment 3

[Bernard Alleysson]

*** Bug 243559 has been marked as a duplicate of this bug. ***

Comment 4

[Bernard Alleysson]

OK I can reproduce now Windows 2003 firefox 20040513 trunk
steps to reproduce:
1) turn on automatic image resizing (Options | Advanced ...)
2) view the given URL so that image resizing is triggered
3) watch CPU go 100%

remark:
CPU stays at 0 when browser window is maximized or automatic image resizing is off

Comment 5

[Anders Pedersen]

Confirmed.

- Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8a) Gecko/20040514
Firefox/0.8.0+
- Microsoft Windows 2000 Pro 5.00.2195 SP4

Comment 6

[Boris Zbarsky [:bzbarsky]]

We store images internally at original size, so painting a resized version
_will_ be slow.  Doing so over and over (as in, when it's animating) will be
correspondingly slow.

Comment 7

[Pier Luc Petitclerc]

It doesn't matter wether image resizing is on or not, the bug *still* happens in
both cases.

Comment 8

[Marius Strumyla]

i've got firefox0.8 running under win2k with 600mhz CPU

when i load the url, my CPU usage is < %10. when i minimize browser so that
image is resized, my CPU usage is < %30.

Comment 9

[Marius Strumyla]

Reporter, try the url with a clean profile and without all those extensions.

Comment 10

[O. Atsushi (Torisugari)]

*** Bug 292289 has been marked as a duplicate of this bug. ***

Comment 11

[Robert Hancock]

The URL supplied here didn't work for me, this one does:

http://home.comcast.net/~balivandi/fark/PeopleInSquareBig.gif

Auto-resizing is NOT enabled, but the CPU usage is really high and the animation
runs slowly. IE6 works fine with under 50% CPU usage.

Interestingly under Linux with Firefox 1.0.3 it also works fine..

Comment 12

[Rich]

Clean profile, Deer Park Alpha 2, and I'm having the same problem as the
submitter...high CPU load when I come upon a page with more than two or three
animated GIFs.

Oddly enough, I'm running Linux.

Comment 13

[maycontainnutz]

Confirmed here too. 
Appeared after upgrading graphics card from NVidia MX440 to NVidia 6600GT (and
upgrading drivers to 77.71. latest 77.77 drivers are the same). Disabling
"bitmap acceleration" by turning down "hardware acceleration" in
display-properties, settings, advanced, troubleshoot is a workaround for me.
Deer Park Alpha 2 seems to have the same problem.
My Example:
http://eclectech.co.uk/b3ta/usbee.gif
or in page:
http://eclectech.co.uk/b3ta/usbee.gif.html
Oddly, the CPU usage seems to be proportional to the amount of the image
unobscured by other windows.

Comment 14

[DarkLuminus]

Attachment: gif

With Hardware acceleration on full the gif i have attached gives me +50% CPU
usage (with hyper threading). However with the acceleration one notch down i
get almost no CPU usage. Other non Gecko browsers do not display high CPU use
and it is not seen on Linux (tested on latest Ubuntu) only Win32 (possibly in
conjunction with newer DX versions).

XP SP2 DX9c, P4 3.2, NV 5950 Ultra 77.77
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) Gecko/20050822
Firefox/1.0+ ID:2005082206

There are quite a few bugs which may or may not be related. 194627 170272 86319
143046 293222 there is also a animated image tracking bug (GIF and MNG) 119597

Comment 15

[DarkLuminus]

Fix with latest Nvidia 80.xx drivers (at least with 81.82 and 81.84).

Also see

High CPU usage and huge slowdown when viewing GIF files with transparency
https://bugzilla.mozilla.org/show_bug.cgi?id=293222

Comment 16

[Marius Strumyla]

dupe of 293222?

Comment 17

[Ryan Jones-Ward [:sciguyryan]]

*** Bug 347722 has been marked as a duplicate of this bug. ***

Comment 18

[u252996]

Being chained to a bug which is older than 2 years is ... well folks, you simply don't care. As with a lot of open source projects, the REAL discipline is missing here or at least has become a victim of the never ending we-want-new-bells-and-whistles hunger.

The good news: In the meantime I removed the transparency from my animated gif and the high CPU load is gone.

And I removed my old testfile, too. Because I'm not interested in loosing bandwith due to hundreds of poor Firefox Bugzilla users who want 'to have a look' while the state of this bug isn't even assigned.

Comment 19

[Tim Graupmann]

More repro steps
================
Browse the URL: http://forums.mozillazine.org/viewtopic.php?p=2479072#2479072

The image on the page is a looping GIF. The problem occurs when the GIF loops. A burst of CPU usage and the mouse freezes for 500 ms.

Comment 20

[Steve Snyder]

https://bugzilla.mozilla.org/show_bug.cgi?id=371770

Relevant?

Comment 21

[Wayne Mery (:wsmwk)]

Anyone who has seen this bug - do you still see it using Firefox 2?   

FF2 browser.enable_automatic_image_resizing default is true and image from comment 19 is http://artists.reactorinteractive.net/materials/Bits_and_Bobs.gif
WFM Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.2) Gecko/20070219 Firefox/2.0.0.2

Comment 22

[Steve Snyder]

(In reply to comment #21)
> Anyone who has seen this bug - do you still see it using Firefox 2?   

I don't see 100% utilization.  What I see is a toggling of CPU use from %5 to 25% (in Task Manager), with the higher use seen on the image transitions and the lower between transitions.  My mouse doesn't freeze between frames.

FF v2.0.0.6 on WinXP/SP2; 1.80GHz P4; 1024MB RAM.

Comment 23

[Wayne Mery (:wsmwk)]

(In reply to comment #19)
> Browse the URL: http://forums.mozillazine.org/viewtopic.php?p=2479072#2479072
> The image on the page is a looping GIF. The problem occurs when the GIF loops.
> A burst of CPU usage and the mouse freezes for 500 ms.

Tim reports "testing with 
http://img.turn.com/r/img?url=http%3A%2F%2Fimg.turn.com%2Fimg-data%2F300x250_even2_4.gif
Under Windows 2003, the CPU usage looks normal to me."


FWIW, in bug 293222 the problem was resolved in '05 by using newer nvidia drivers.