[SciPy-user] SciPy ATLAS vs. Matlab 7.2 linear algebra benchmarks

Robert Kern robert.kern@gmail....
Thu Aug 30 11:39:26 CDT 2007

Jose Unpingco wrote:
> For this experiment, I create a square matrix with random entries of
> size 500, 1000, 1500, 2000 and then apply a variety of factorizations to
> those matrices. Naturally, each of these experiments is run on exactly
> the same workstation. The times are wall times in seconds.
> The bottom line is that Matlab is still substantially faster than either
> of the ATLAS library versions.

Please be careful with such statements. Matlab is not the thing that's faster;
it's the BLAS and LAPACK underlying it. I see that in 7.2, they've started using
the Intel MKL or the ACML (depending on the processor) by default. That's the
source of the timing difference. Note that scipy can use either of these
libraries, too.

Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco

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