[Numpy-discussion] NumPy speed tests by NASA

Gael Varoquaux gael.varoquaux@normalesup....
Tue Feb 22 15:48:09 CST 2011


On Tue, Feb 22, 2011 at 04:44:56PM -0500, Alan G Isaac wrote:
> On 2/22/2011 3:45 PM, Sturla Molden wrote:
> > I came accross some NumPy performance tests by NASA. Comparisons against
> > pure Python, Matlab, gfortran, Intel Fortran, Intel Fortran with MKL,
> > and Java. For those that are interested, it is here:

> > https://modelingguru.nasa.gov/docs/DOC-1762

> I don't believe the matrix multiplication results.
> Maybe I misunderstand them ...

Probably because the numpy binary that the author was using was compiled
without a blas implementation, and just using numpy's internal
lapack_lite. This is a common problem in real life.

Gaël


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