[Numpy-discussion] NumPy speed tests by NASA
Wed Feb 23 13:29:24 CST 2011
Den 23.02.2011 18:34, skrev Benjamin Root:
> Just to point out, this person used Matlab 2008. While I do not use
> Matlab on a regular basis, I have seen marked improvements in
> performance in subsequent versions.
They have got a JIT compiler for loops. Matlab is actually an easy
language to JIT compile because all objects are immutable, assignments
always make copies (implemented as copy-on-write), and there is never
any aliasing. The problem with this is slowdown when working with large
arrays and severe heap-fragmentation on 32-bit systems.
> I have also seen differences in performance for the same version of
> Matlab running on the different OSs of a dual-boot machine.
The Windows version used to come with Intel MKL and the Linux version
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