Matrix mul

[Bill Baxter]

On Sun, Nov 23, 2008 at 12:25 PM, BCS <ao at pathlink.com> wrote:
> Reply to bearophile,
>
>> Bill Baxter Wrote:
>>
>>> I haven't done any benchmarks, though. :-)
>>>
>> I see. But using something because it's supposed to be faster without
>> performing actual performance comparisons looks a little strange to me
>> :-)
>>
>
> BLAS may well be the most tested, optimized and benchmarked code in the
> world. It is highly unlikely that anything will be faster on hardwhere
> anyone is likely to run across. Given that the vast bulk of super computer
> time is spent on matrix math, it should be fair to say that BLAS is probably
> the most executed code on the planet.

Exactly.  That's why I haven't spent too much time benchmarking it.
It would be quite surprising if something I wrote in D outperformed
the ATLAS SSE3 optimized BLAS implementation.  (Though It would not be
so surprising if something Don wrote managed to outperform it. :-) )

--bb