> why fortran?
why not? the language is straightforward and loops are fast. It is portable and your code will work unchanged for the next 50 years. It may be a bit verbose, but that's not a big deal with today's tooling.
Your code will work unchanged until you try to change compilers or your compiler adopts a J3 breaking change to the language.
Great, can we see some benchmarks?
Fortran will survive the cockroaches even, when the world 404s