Re: Polyhedron shootout between g95 and gfortran

[Paul Thomas <paulthomas2 at wanadoo dot fr>]

Dominique,

> induct.f90 use dot_product with length 3 vectors. A couple of months
> ago Paul Thomas propsed a patch to inline the dot_product.
> On a G5 (1.8Ghz) I get 295.2s without the patch and 68.4s with it.
>  
I got a bit stuck with this patch; largely because of REAL(10) 
problems.  It is one of a very long list of TODOs that I will get back 
to as soon as I can.

> Note that I also use another Paul Thomas' patch in dependency.c
> to speed up the line
>
>      b(:,j) = b(:,j)-temp*c
>
> So may be we can team together to press Paul to include these two 
> patches in the snapshots (at least in 4.2).
This last is about to be committed - probably on Friday.  I had held it 
back because I was aware that there are many other improvements that can 
be made in dependency.c and its callers; I had hoped to deal with more 
than one of them before submitting a definitive patch. However, other 
pressures have interceded... ie. yet another TODO.  On teh positive 
side, the time delay has enormously improved the patch that I will commit.

Slogging away at it.

Paul