[Numpy-discussion] when and where to use numpy arrays vs nested lists
Mark P. Miller
mpmusu at cc.usu.edu
Thu Mar 1 17:21:17 EST 2007
One more note (this perhaps may need a separate topic):
I've been using the Enthought python edition that contains python 2.4.3
and numpy 0.9.9.2706. After Robert Kern pointed out that I should try
numpy 1.0.1, I went ahead and installed it (downloaded a few hours ago:
"numpy-1.0.1.win32-py2.4.exe").
Now however, I'm seeing perhaps a more serious problem: The test
program that I'm working with went from taking ~80 seconds to run to
taking over 10 minutes to run. I've rolled back to my old numpy version
and confirmed that the old version was much faster. I also tried
re-installing 1.0.1, and once again am seeing much slower runtimes.
My code contains numpy arrays where items are accessed on an
element-by-element basis. I also make use of some of numpy's random
number generators.
Just thought I'd point this out,
-Mark
Christopher Barker wrote:
> Francesc Altet wrote:
>> Ops, this seems a bug with your numpy version:
>
> yup, it's a bug here too:
>
> >>> numpy.__version__
> '1.0.1'
>
> this is the dmg for python2.5 on pythonmac.org/packages
>
>
>
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