Speeding up numpy.dot

Question

I\'ve got a numpy script that spends about 50% of its runtime in the following code:

s = numpy.dot(v1, v1)

where

v1 = v[1

Answer 1

numpy.dot will use multithreading if compiled correctly. Make sure that it does with top. I know of cases where people didn't get multithreading in numpy w/ atlas to work. Furthermore, it's worth trying to use a numpy version that is compiled against the intel mkl libraries. They include blas routines that are supposed to be faster than atlas on intel hardware. You could give enthought's python distro a try. Contains all this and is free for people with an edu email account.