If or function pointers in fortran

Question

as it is so common with Fortran, I\'m writing a massively parallel scientific code. In the beginning of my code I read my configuration file which tells me which type of solver

Answer 1

If you only plan to use the function pointers once, at initialisation, and you are running codes on a BlueGene, isn't your concern for the efficiency mis-directed ? Generally, any initialisation which works is OK, if it takes 1sec instead of 1msec it's probably going to have 0 impact on total execution time.

Code initialisation routines for clarity, ease of modification, that sort of thing.

EDIT

My guess is that using function pointers rather than your current code will have no impact on execution speed. But it's just a (educated perhaps) guess and I'll be very interested in any data you gather on this question.