How should I declare a constant array for speedy execution.....?

Question

the array....
double M[32][64] = {
/*512 double valued constant numbers*/.
.........} ;

should I include it in main or as global or as a separate header file?
please help ..the main goal is speedy execution.

Answer 1

it matters on which functions will be using it if only one function then global if more then one function will be using it

Answer 2

iono