[ynniv]

Well, it's a 700k interpreter and runtime. It isn't slow for simple things, but only because JS is really fast now. Interpreters are usually 5 to 10 times slower than whatever they are running in.

http://hashcollision.org/whalesong/examples/raphael-demo/rap... isn't bad

http://hashcollision.org/whalesong/examples/boid/boid.html is a little slow compared to http://graphics.cs.wisc.edu/Courses/Games12/Tutorial1/Phase1...

Some of the low framerate could be frame timing (whalesong could be using setTimeout poorly), but they seem to use about the same CPU.

[batgaijin]

Huh, didn't know that. For some reason I thought it compiled to JS.