The perf difference between safari/chrome is much larger on Snow Leopard, unsurprisingly.

I remember animated gif performance being terrible in both Safari and Chrome, and it would get worse the 
longer the animation played.  Maybe something related is happening here?  (If drawing the animated gif is taking 
forever, then that would account for bad renderer fps.)

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experiencing something similar in chrome 5.0.375.55 mac

example page: http://www.zonalmarking.net/2010/05/24/zms-end-of-season-awards/ scroll about half way 
down, on my system the tab basically freezes with 100% cpu usage 

Moving all bugs marked as untriaged and mstone X to be available rather than untriaged.  If you think this is in error, please feel free to set back to untriaged.

I am on a Macbook Pro, i5 2.4ghz, 4gb ram, OSX 10.6.4.  This issue happens whether using 330m graphics chip or the integrated intel.

Chrome(6.0.472.63) and Safari(5.0.2) both scroll horribly on pages with animated .gif images on them.
Firefox(3.6.8) and Camino(nightly 2.1a1pre) both scroll wonderfully. 
Thus, I assume there is an inherent problem with webkit as opposed to gecko.  

Note: this is not the same issue as the .gifs not displaying properly bugs that are posted.  I do not have that problem on any browsers.

Chrome Version       : 6.0.401.1 dev
Behavior in Safari 3.x/4.x (if applicable): also kinda slow, but much better than chrome
Behavior in Firefox 3.x (if applicable): Smooth
Behavior in Chrome for Windows: Ok

<b>What steps will reproduce the problem?</b>
1. Go to http://www.smashingmagazine.com/2010/05/18/the-beauty-of-typography-writing-
systems-and-calligraphy-of-the-world/
2. Scroll to the animated yellow logo (about 40% down)
3. Wait for animation to start
5. Try to scroll

<b>What is the expected result?</b>

Smooth scrolling.

<b>What happens instead?</b>

Incredibly janky scrolling (~0.1fps).


Doesn't happen in win/linux. Probably CoreGraphics related, but since it's faster in Safari, that 
can't be the only cause. (Does someone know what Firefox uses? CG as well? Firefox is superfast 
here.)

Chrome Version       : 6.0.401.1 dev
Behavior in Safari 3.x/4.x (if applicable): also kinda slow, but much better than chrome
Behavior in Firefox 3.x (if applicable): Smooth
Behavior in Chrome for Windows: Ok

<b>What steps will reproduce the problem?</b>
1. Go to http://www.smashingmagazine.com/2010/05/18/the-beauty-of-typography-writing-
systems-and-calligraphy-of-the-world/
2. Scroll to the animated yellow logo (about 40% down)
3. Wait for animation to start
5. Try to scroll

<b>What is the expected result?</b>

Smooth scrolling.

<b>What happens instead?</b>

Incredibly janky scrolling (~0.1fps).


Doesn't happen in win/linux. Probably CoreGraphics related, but since it's faster in Safari, that 
can't be the only cause. (Does someone know what Firefox uses? CG as well? Firefox is superfast 
here.)

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