You can grab his repo and try it yourself, but as I commented on the blogpost, on my machine I see firefox without asm.js optimizations and chrome as being abou

You can grab his repo and try it yourself, but as I commented on the blogpost, on my machine I see firefox without asm.js optimizations and chrome as being about the same speed, both of them are half the speed of firefox with asm.js optimizations. (I don't have a machine with safari to test on.) Which means the asm.js version is faster than other JS versions, even without specific asm.js optimizations.