Vector operations optimization.

[Comrad]

On Friday, 23 March 2012 at 11:20:59 UTC, Trass3r wrote:
>> The flags you want are -O, -inline -release.
>>
>> If you don't have those, then that might explain some of the 
>> slow down
>> on slicing, since -release drops a ton of runtime checks.
>
> -noboundscheck option can also speed up things.

dmd is anyway very slow, ldc2 was better, but still not fast 
enough.