Thanks for taking a look. Do you really think __call__ affects performance that much? I'll look into OpenCL to improve performance.

The lib looks good otherwise. Might be a useful educational tool if anything.

In my tests it's 2x slower, but it might not be the main reason. I didn't profile it at all.

Another thing is that it seems like it doesn't use Atlas to scale to all the cores even though my Python is linked against it.

It got me excited. But slow to train. :-(