[Numpy-discussion] performance matrix multiplication vs. matlab

Gael Varoquaux gael.varoquaux@normalesup....
Sun Jun 7 05:12:04 CDT 2009


On Sun, Jun 07, 2009 at 06:37:21PM +0900, David Cournapeau wrote:
> That's why compiling atlas by yourself is hard, and I generally advise
> against it: there is nothing intrinsically hard about it, but you need
> to know a lot of small details and platform oddities to get it right
> every time. That's just a waste of time in most cases IMHO, unless all
> you do with numpy is inverting big matrices,

Well, I do bootstrapping of PCAs, that is SVDs. I can tell you, it makes
a big difference, especially since I have 8 cores.

Gaël


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