[pypy-dev] rpython numpy

David Cournapeau david at ar.media.kyoto-u.ac.jp
Wed Sep 26 04:22:33 CEST 2007

Simon Burton wrote:
> I've been having some fun working on a (tiny) rpython version of numpy.
That's great, this is really one of the most interesting part of pypy 
for me.
> The above mentioned "efficient code" is perhaps a non-issue. Numpy
> code tends to become memory-bound, not cpu-bound.
I tend to agree, at least from my limited observation and hacking on 
numpy: some (quite fundamental) operations are not cache friendly at 
all. But I thought this was what rpython + pypy could improve quite a 
lot, actually. For example, one problem with numpy, specially with 
broadcasting and the ufunc machinery, is to decide on which dimension to 
compute for maximum performances.  See for example 


More information about the Pypy-dev mailing list