A lot of that isn't Adobe's fault though, the only browser on OSX currently supporting Core Animation (the most efficient API for drawing to the canvas) is Safari 4. Core Animation drawing has been implemented in 10.1 and at the moment my (rough) tests show it to run up to 60% faster in Safari than Chrome. Obviously still nowhere near Windows standards, but it's a great improvement.
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A lot of that isn't Adobe's fault though, the only browser on OSX currently supporting Core Animation (the most efficient API for drawing to the canvas) is Safari 4. Core Animation drawing has been implemented in 10.1 and at the moment my (rough) tests show it to run up to 60% faster in Safari than Chrome. Obviously still nowhere near Windows standards, but it's a great improvement.