Code runtime

[Ausprobierer via Digitalmars-d]

> On OS X using ldc and clang, I get C++: ~6s and D: ~7s. The 
> slowdown in D seems to be due to parts of nextPermutation not 
> ending up inlined.
>
> Be careful with benchmarks like this, you are giving the 
> compiler a lot more information than it usually has in any real 
> world case (here it knows the exact values of all the input 
> data/parameters!).

I've compiled and run the code on Win7 x64. I think it's a 
compiler issue then, with DMD causing the same slow behaviour on 
Linux x64. If so, I should possibly resort to e. g. LDC.