On Fri, Aug 29, 2014 at 08:38:11AM -0400, Neal Becker wrote: > I noticed pythran using ndarray c++ class, and wondered if it was similar to > > https://github.com/ndarray/ndarray > > which I have been making heavy use of for my python c++ needs. > > It seems not. Indeed > > https://github.com/ndarray/ndarray uses 3 template parameters > > <T,N,M> > > where T is type > N is #dim > M is #contiguous dimensions > > which allows optimization based on contiguity. Â Would pythran be able to > optimize based on contiguousness? Â For example: > > #export sum(int) > def sum (x): > > would pythran be able to detect whether the argument is contiguous and > dispatch > accordingly? I am not sure of what you mean by contiguous dimensions. In Pythran an ndarray always wraps a flat pointer. When taking slices, it does not create an intermediate array, but a view that stores the slices/strides and so on. I am unsure my answer is clear... BTW, what's your background / what are you using Pythran for?