numarray.array can be VERY slow

[Steven Bethard]

Edward C. Jones wrote:
> #! /usr/bin/env python
> 
> """Should this program take 4.3 seconds to run? I have a Linux PC with
>    an AMD Athlon XP 2000+ chip (1.7Gh). I use Python 2.4.1 and numarray
>    1.2.3, both compliled from source."""
> 
> import time, numarray
> from numarray.numerictypes import *
> 
> nested = []
> for i in range(8):
>     inner = []
>     for j in range(8):
>         inner.append(numarray.ones((256,256), Float64))
>     nested.append(inner)
> t = time.clock()
> arr = numarray.array(nested)
> print time.clock() - t

As mentioned, this has nothing to do with numarray, and everything to do 
with your inexplicable use of lists.  Why don't you just write this as:

arr = numarray.ones((8, 8, 256, 256), Float64)

??

STeVe