Optimizing Python with Cython (doublemap.github.io)

Looking at this step:

-from math import sin, cos, acos

+from libc.math cimport sin, cos, acos

What happens if the C math functions and the Python math functions don't take the same arguments/kinds of arguments?

On my system, PyPy is 4x faster than the fastest Cython version given.

If you can live with changing the signature from two tuples to just taking the four floats, you'll see a big further improvement --- these are the only lines showing up yellow when running the code through cython -a: https://rawgit.com/syllog1sm/a13542690c59d5e60ebf/raw/499418...