Re: MTL and C++ compilers - some thoughts

On Monday, 2. September 2002 18:04, you wrote:
> > btw: I currently do FEM für (2D) convection-diffusion problems. My
> > program spends most of its time in find(..), insert(..) and
> > vec_ref(..) of compressed2D :-(
>
> Have you tried storage format array<compressed<> > for your system
> matrix? Judging from some comparisons I made a while ago, matrix
> assembly was way faster than with compressed2D.

After some bugfixes I tried array<compressed<> > and the matrix 
assembly is much faster (factor 100) but solving the system is some 
times slower. The biggest disadvantage of array<compressed<> > is that 
the storaged is not contiguous. Now I copy the array<compressed<> > to 
an compressed2D<> matrix before solving the system.

regards
Gunter Winkler
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