Issue 165750 in chromium: Some antimated GIFs still cause 100% CPU load, while tab is active

[chro...@googlecode.com]

Status: Unconfirmed
Owner: ----
Labels: Pri-2 Via-Wizard Type-Bug OS-Windows

New issue 165750 by synet...@gmail.com: Some antimated GIFs still cause
100% CPU load, while tab is active
http://code.google.com/p/chromium/issues/detail?id=165750

UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML,
like Gecko) Chrome/23.0.1271.95 Safari/537.11

Steps to reproduce the problem:
1. Open a page containing an animated GIF
2. Look at CPU load

What is the expected behavior?
Normal, low CPU load (assuming a non-massive GIF, of course)

What went wrong?
Some animated GIFs are okay, but many still cause a 100% CPU load,
including those that *should not* be causing such a high load

Did this work before? No

Chrome version: 23.0.1271.95 Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)

What is peculiar is that only *some* animated GIFs cause this and it may be
size-related in part.

For example, *all* of the individual DOOM maps at
http://www.classicdoom.com/ cause a 100% CPU load, however the All-Maps
page does NOT.

Moreover, viewing the GIF itself instead of embedded in a page still uses
more than it should, but far less than 100%:

http://www.classicdoom.com/maps/plusecs/plu15.htm
http://www.classicdoom.com/maps/plusecs/plu15.gif
http://www.classicdoom.com/maps/plusecs/plu.htm

In addition, this only happens when the page in question is the active tab;
switching a different (that doesn’t have an animated GIF) drops CPU load
back to normal.

[chro...@googlecode.com]

Comment #2 on issue 165750 by Wolphie: Some antimated GIFs still cause 100%

CPU load, while tab is active
http://code.google.com/p/chromium/issues/detail?id=165750

Indeed, the cpu usage is insane for many animated gifs.

I just noticed my cpu usage spike to 100% on 1 core simply because there
were a few animated gifs on a page...

--
You received this message because this project is configured to send all
issue notifications to this address.
You may adjust your notification preferences at:
https://code.google.com/hosting/settings

[chro...@googlecode.com]

Comment #4 on issue 165750 by o...@itmaze.com.au: Some antimated GIFs still

cause 100% CPU load, while tab is active

https://code.google.com/p/chromium/issues/detail?id=165750

Here's one that does it within gmail.

Attachments:
radio.gif 7.3 KB

[chro...@googlecode.com]

Comment #5 on issue 165750 by o...@itmaze.com.au: Some antimated GIFs still

cause 100% CPU load, while tab is active
https://code.google.com/p/chromium/issues/detail?id=165750

Here's one that does it in gmail. I recreated the post, since the comment
uploader changes the gif, not helpful in this case ;-(

Attachments:
radio.gif.zip 3.8 KB