[Cython] __next__ | not being able to use cpdef

[Greg Ewing]

Jelle Feringa wrote:

> I did not understood why its necessary to wrap the do_curvature call  
> in Cython though: the call is close enough to C++ execution speed.

If you're finding it fast enough for your purposes,
then that's fine. It's just that it would be faster
still if you got rid of the overhead of the Python
function call mechanism and called the underlying
C or C++ function directly.

-- 
Greg