[Numpy-discussion] Array concatenation performance

[Fabrice Silva]

Le jeudi 15 juillet 2010 à 16:05 +0100, John Porter a écrit :
> You're right - I screwed up the timing for the one that works...
> It does seem to be faster.
> 
> I've always just built arrays using nx.array([]) in the past though
> and was surprised that it performs so badly.

Can anyone provide an explanation (or a pointer) to such differences ?
Thanks