NEW 43815
Heavy use of shadow blur in canvas is slow 
https://bugs.webkit.org/show_bug.cgi?id=43815
Summary Heavy use of shadow blur in canvas is slow
Michael Dewey
Reported 2010-08-10 15:02:09 PDT
Webkit's implementation of <canvas> has some issues when it tries to do a lot of drawing with high shadow blur. In every other area of <canvas> rendering webkit is much faster than gecko browsers, but in this case it grinds to a crawl where gecko browsers render at about the same speed. In the referenced web page, the "basic" brush and "paintbrush" use shadows to draw soft lines. I had to make it so the maximum softness on webkit browsers is only 20% of what maximum softness is on gecko browsers because it was otherwise unusable.
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