each! vs foreach parallel timings

[Jay Norwood via Digitalmars-d-learn]

> On Sunday, 27 December 2015 at 23:42:57 UTC, Ali Çehreli wrote:
>> That does not compile because i is size_t but apply_metrics() 
>> takes an int. One solution is to call to!int:
>>
>>         foreach( i, ref a; parallel(samples[])){ 
>> apply_metrics(i.to!int,a);}
>>

It builds for me still, and executes ok, but must be because 
size_t and i are both 32 bits on Win32 build.