Re: BLAS Level 1 operations in Octave

[Marco Caliari]

On Thu, 25 Aug 2016, John W. Eaton wrote:

> On 08/25/2016 09:27 AM, Marco Caliari wrote:
>
> > Since "it might be a worthy goal, after the 4.2 release, to look at
> > improving Octave's performance", is this a possible topic to be
> > investigated?
>
> Yes.
>
> jwe

Thanks. Of course, I can't introduce such a big change into Octave myself. 
But, I will help you as much as I can. For instance, with the help of the 
attached simple fortran file, I discovered that ATLAS daxpy is *not* 
multithreaded, while OpenBLAS is. The daxpy version with OpenBLAS takes 
about 7 seconds and all the other versions about 14 seconds.

Marco

level1.f.gz
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