[Numpy-discussion] Numpy Overhead

[Matthew Brett]

Hi,

On Tue, Feb 28, 2017 at 2:12 PM, Sebastian K
<sebastiankaster at googlemail.com> wrote:
> Thank you for your answer.
> For example a very simple algorithm is a matrix multiplication. I can see
> that the heap peak is much higher for the numpy version in comparison to a
> pure python 3 implementation.
> The heap is measured with the libmemusage from libc:
>
>           heap peak
>                   Maximum of all size arguments of malloc(3), all products
>                   of nmemb*size of calloc(3), all size arguments of
>                   realloc(3), length arguments of mmap(2), and new_size
>                   arguments of mremap(2).

Could you post the exact code you're comparing?

I think you'll find that a naive Python 3 matrix multiplication method
is much, much slower than the same thing with Numpy, with arrays of
any reasonable size.

Cheers,

Matthew