Intel also has C/C++ compilers which probably share optimizers and backend code generators with their Fortran compiler and shouldn't be worse. Ditto for 3rd par

Intel also has C/C++ compilers which probably share optimizers and backend code generators with their Fortran compiler and shouldn't be worse. Ditto for 3rd party commercial vendors like PGI. And, BTW, I have seen a case where PGI vastly outperformed GCC on the same code. So compilers matter.