Thanks Ando, I know of the slight speed advantage in some cases on the Intel side, but the question was more why the compilation takes so much longer?
Dominik Andreas Grassl wrote: > Hi Dominik, > > Dominik Szczerba wrote: >> I have noticed already a longer while ago: setting up PETSc with the >> Intel compilers (--with-cc=icc --with-cxx=icpc) takes an order of >> magnitude longer than with the native GNU. The step taking most of the >> time is configuring mpich. I have tried to configure mpich separately >> and indeed, with gnu it is a breeze, with intel 10x slower. In both >> cases, linux both 32 and 64 bit, Ubuntu 9.04 and debian testing. Intel >> compilers 10.x and 11.x. >> >> I just wanted to ask opinion if anybody has similar observations and/or >> finds using intel worthwhile at all. > > On itanium machines intel compilers produce much faster code compared to > gnu-compilers. On other machines I did not notice a big speed difference, but > I > think intel compilers produce slightly faster code as well. > > Cheers, > > ando >
