Re: [Psyco-devel] RE: [Numpy-discussion] Interesting Psyco/Numeric/Numarray comparison

[Francesc A. <fa...@op...>]

A Dimecres 05 Febrer 2003 17:53, Tim Hochberg va escriure:
> However, for small arrays it seems that you're likely to
> be fighting the function call overhead of Python unless you go
> completely, or nearly completely, to C. But that would be a shame as it
> would make modifying/extending numarray that much harder.

For this task may be is worth to consider using Pyrex
(http://www.cosc.canterbury.ac.nz/~greg/python/Pyrex/) for that. From the
website:

"""Pyrex lets you write code that mixes Python and C data types any way y=
ou
want, and compiles it into a C extension for Python."""

i.e. if you have code in Python and want to accelerate it, it's quite mor=
e
easy moving it to Pyrex rather than C, as Pyrex has Python syntax. In
addition, it lets you call C routines very easily (just declaring them) a=
nd
provide transparent access to variables, functions and objects in Python
namespace. Apart from the standard Python loop statement, Pyrex introduce=
s a
new kind of for-loop (in the form "for i from 0 <=3D i < n:") for iterati=
ng
over ranges of integers at C speed, that can, for sure, be very handy whe=
n
optimizing many numarray loops.

Another advantage is that Pyrex compiles their own code to C and you can
distribute this C code in your package, without necessity to force the fi=
nal
Pyrex extension user to install Pyrex (because it's just a kind of
compiler). I've been using it for more than six months and it's pretty
stable and works very well (at least for UNIX machines; I don't have
experience on Windows or OSX platforms).

Just my two cents,

--=20
Francesc Alted