In a sane world (which is the world that we live in), it's best to find a well-optimized library for common operations like matrix multiplication. But if you wa

In a sane world (which is the world that we live in), it's best to find a well-optimized library for common operations like matrix multiplication. But if you want to do something unusual (multiply large matrices inside a browser, quickly) you've exited the sane world so you'll have to work at it.