Quick performance test for Flash vs Silverlight. This just counts prime numbers and doesn’t touch graphics or multimedia. See Bubblemark and GUIMark for some more comprehensive tests; I just put this one together to satisfy my own curiosity. More details, and the code to scrutinize, here.
Please don’t take this too seriously. I may have messed up the test; it is only one small aspect of performance; and there are lots of other factors to think about. I just find this sort of thing interesting.
Update: Note that both Flash and Silverlight have just-in-time compilers that dramatically speed this type of code.
Comments are welcome here.