Why NDArray is faster than int32NDArray?

[Hamid 2C]

Hi all,

I have coded two different version of array multiplication in C++
using Octave library.
When I use NDArray as the type for arrays, multiplication is done
faster compared to the case where int32NDArray is used. I am wondering
what's the reason for this. Somehow, I expected the opposite since
NDArray is an array of doubles and int32Array is an array of integers
if I understand it correctly.

Thanks,
Hamid