Re: Matrix Multiplication

On Jan 5, 11:06 am, b52b <jam...@xxxxx> wrote:
On Jan 5, 8:37 am, Evgenii Rudnyi <use...@xxxxxxxxx> wrote:
. I just wonder why Gordon prefers to keep silent when it> comes to the code.

This is matter of ethics. Writing an educational text is hard because
you should be up to date. That's what Gordon said in my opinion.
You can't blame him - it is your article.

Sorry, but I would disagree. My text is completely up to date. The
current practice for linear algebra with dense matrices is to use
LAPACK (by the way, it is written in Fortran 77) together with the
optimized BLAS. From what a programming language to call LAPACK and
optimized BLAS does not matter.

Also if you read the conclusion, it says

http://matrixprogramming.com/MatrixMultiply/
-------------------------------
I hope that this chapter has convinced you that it is very important
to use libraries even for seemingly simple things, like matrix
multiplication.
--------------------------------

I am pretty sure it concerns the newer Fortran as well. There are no
miracles, either one uses optimized DGEMM or performance suffers. The
use of optimized DGEMM can be behind the scene, as in NumPy, Matlab
and Mathematica, this does not matter.

My advice : sent your request to comp.lang.fortran
Otherwise this is another face of the language war.

This what I wanted to escape, as personally I believe that good
performance can be achieved in any programming language provided that
one understands the technology.

My text is more about technology, not about a programming language.

Evgenii
.

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