I have to say that, while I haven't looked into the details, this is quite impressive. It runs really smooth on my not-so-great desktop. A good sign that Javascript is no longer the great bottleneck it used to be.
Yet another indicator of how powerful modern CPUs and modern javascript has become. Yet when I see projects like this, I think about how everyone's video cards & chips already have hardware video decoding. Why are we not given access to those APIs? This seems fundamental, yet never a peep about them. I want access to my own friggen hardware. And it's about time video decoding got standardized, isn't it? Why, other than media publishers being afraid of it, do we not have access to these APIs?
This is really cool. It seems to me that what browsers really need in order to unlock huge amount of potential in high performance graphics is an API for hardware accelerated DSP operations like FFT.