Very similar. I'm not challenging Actionscript developers, this is an entry to the JS1k.com competition. I don't understand why it's being compared to C++ (a language that isn't web compatible) and Actionscript (a very fine language, but not part of the JS1k competition).

FYI - there is no war between HTML and Actionscript, the whole tension around that has really been getting to me. They are both good, I use both - PixelBender is especially amazing. I don't see why when anyone mentions HTML5, Javascript, or <canvas> it triggers so many emotions. We're all trying to push the web forwards together.