Basic benchmark

[Walter Bright]

bearophile wrote:
> Timings:
> 
> C gcc:
>   Long arithmetic: 11.15 s
>   Nested Loops: 0.11 s
> 
> D dmd:
>   Long arithmetic: 63.7 s
>   Nested Loops: 6.17 s

I suggest running obj2asm on the resulting obj files and see what the 
real difference is.