Some minor tweaks

Hi. 

I rewrote the perf tests to not create arrays and not rely on potential overhead of lambdas. 

It seemed that the sheer size of the arrays affected the results on the last test runs. Now C# and F# seems to perform similar when applying the "ugly" approach. This was a relief to me.

I know I screwed up the tabs (I have space instead of tabs) but I guess you just like to look at the code anyway.