Best programming language for handling array calculations in parallel?

[gomefun2]

I have some experience in just about every major programming language.

I built some software in python for fun, but I want to now take the project in a more serious direction.

Basically, the program does calculations on what is essentially a 100x7 array (100 rows x 7 columns). I want to speed up the python code significantly. I was thinking of rewriting it in FORTRAN using GPU acceleration for parallel calculation (like CUDA cores on my NVIDIA GPU).

I have never done parallel programming. Basically, my program does math on this 100x7 array (100 rows x 7 columns) and not much else.

I want the fastest possible way to do calculations, would running FORTRAN with GPU support be the fastest way to do this?

My code is already very fast in python, but I want to speed it up more.