Comment #16 on issue 20067 by [email protected]: Canvas - memory leaks on  
getImageData
http://code.google.com/p/chromium/issues/detail?id=20067

Both the originally reported case  
(http://alteredqualia.com/visualization/evolve/)
and smaller repro html work fine w/ most recent build of Chromium.  So I  
cannot
reproduce it on my box.  Could you reproduce the crash for those sites on  
your box?

Please, notice that memory will grow to ~256M and only when get shrinked.

Regarding "One would expect the garbage collector to know to reclaim the  
memory of
the discarded ImageData buffers on each new assignment. As the original  
report
states: Firefox does this correctly."  That is a correct assumption for  
refcounting
GC, V8 doesn't work that way.

"Chrome 4's JavaScript engine appears to be even faster than previous  
versions. I get
about twice the framerate as on firefox."---thanks a lot, that's really  
important for us.

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