Will declaration of array outside a function increase the performance of repeatedly calls to the function?

Question

function MyFunc(const Value: Integer): Integer;
const
  MyArray: array[0..255] of Byte = ( ... ); // values of the array here

begin
  ... // Some codes here
  Result := Integer(MyArray[Value shr 58]);
end;

Will declare MyArray outside MyFunc increases the performance of repeatedly calls to MyFunc?

Answer 1

Will declare MyArray outside MyFunc increases the performance of repeatedly calls to MyFunc?

No. The compiler will produce identical code no matter if MyArray is local to the function, or a constant at a wider scope. Typed constants are stored in the data segment of the executable, irrespective of their scope.