Results are in: static foreach is a slower than hand unrolling yourloops or using mixins.

[Gareth Charnock]

I don't actually know assembly language so no, this is all purely 
empirical.

BCS wrote:
> Hello Gareth,
> 
>> I managed to get some free time to look at this and it would appear
>> that static foreach is slower than hand unrolling a loop. Fortunately
>> there are no detectable differences between hand unrolling a loop and
>> building the body of the loop in a compile time string and using a
>> mixin. Results are here:
> 
> Last time I checked, static foreach tended to load the index onto the 
> stack for each iteration even if it was never used. Did you take a look 
> at the ASM?
>