Matrix Multiplication benchmark

[Matthias Pleh]

Am 16.08.2012 15:18, schrieb RommelVR:
>
> I suggest changing 'in' to 'const ref' for a real boost;

The mentioned thread suggest it the other way around.
Also this gives me not the answer for my question.

Note, it's not a question of comparison of 2 languages (C vs. D), but 
rather the comparison of operator overloading vs. free global functions.