The example is simple enough that the different languages should not make a difference, and stupid enough not to prove anything. The loop could be optimised away by a compiler into a simple assignment, or left running for the whole number of iterations, or some of the iterations might be unrolled... I am not sure why you decided to write that test program, but it does not test anything regarding the languages, as once the logic optimisations are performed it all boils down to exactly the same assembly.
Also, regarding the performance of the intel compiler, it will greatly depend on the exact hardware and the compiler version. The compiler generates different versions of the code, and has a tendency to generate horrible code for AMD processors. Even for intel, if it does not recognise the specific processor it falls back into a safe slow mode.
