[pypy-dev] numpy plans in the next 6 months?

[Ian Ozsvald]

Interesting answer :-) numexpr does a bit of this but your bigger
point is that pypynumpy should go much further. That indeed will be
interesting.
Cheers, i.

On 20 February 2014 18:07, Armin Rigo <arigo at tunes.org> wrote:
> Hi Ian,
>
> On 20 February 2014 12:59, Ian Ozsvald <ian at ianozsvald.com> wrote:
>> Hi again. In relation to my other mail, I'm curious about the plans
>> for numpy in the next 6 months. Is there an expectation that
>> better-than-numpy results might be obtained (e.g. using AVX/SSE or
>> being cache friendly)? I'll mention these as they will probably be
>> relevant to some of the audience.
>
> The most relevant way to answer is probably to say that we're not
> looking at AVX/SSE or cache friendlyness to get better-than-numpy
> results.  These are things that can be (and, I'm sure, have been)
> experimented with in CPython too.  The real advantage that PyPy has is
> a JIT that can "unconventionally" be taught to produce code handling a
> combination of matrix operations at a time.
>
> If you say in numpy "a + b + c", the intermediate matrix "a + b" is
> built and forgotten.  This would not be needed if we had a way to do
> the sum of the three input matrices in one go.  But that needs some
> JIT somewhere, to produce the code doing this particular operation (in
> this case, the sum of three matrices).  The point of PyPy is to
> provide precisely such a JIT for free.
>
> Unless I'm missing something, the plans for numpy in the next 6 months
> include doing this --- or rather, re-doing it.  It used to work
> already at the beginning of numpypy, but was temporarily dropped to
> make it easier to progress on completeness.  I can imagine that this
> would definitely give better-than-numpy results on a large fraction of
> programs.
>
>
> A bientôt,
>
> Armin.



-- 
Ian Ozsvald (A.I. researcher)
ian at IanOzsvald.com

http://IanOzsvald.com
http://MorConsulting.com/
http://Annotate.IO
http://SocialTiesApp.com/
http://TheScreencastingHandbook.com
http://FivePoundApp.com/
http://twitter.com/IanOzsvald
http://ShowMeDo.com