Port a benchmark to D?

[Andrej Mitrovic]

DMD debug: 50s
DMD optimized: 49s (-release -noboundscheck -O -inline -L/STACK:1280000000)

That's around 1GB of stack memory.
Compiling with GDC will make the app throw an exception at runtime due
to the stack being blown, the error message isn't special but it's
better than no error message.

GDC debug: 1m:24s
GDC optimized: 1m:12s (gdc -v2 -O3 -Wl,--stack,1280000000)

I haven't tested the other ones. Does Go have a Windows compiler yet?