Steven Bethard wrote:
> 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)
The code I posted was simplified from a larger program which I have now revised. But I still ask: why did it take 4.3 seconds to run?
Is the simple answer not that repeated use of array.append is inefficient as python has to repeatedly re-allocate memory for the array?
I had a similar problem as I ran a simulation and appended the results to a results set. Now I create a list of objects of the size required and the overwrite them. Much faster :)
Jim Getting in there late cos I've been skiving -- http://mail.python.org/mailman/listinfo/python-list
