Reflections on isPalindrome

[MattCoder via Digitalmars-d-learn]

On Tuesday, 28 October 2014 at 16:07:38 UTC, MachineCode wrote:
> I'm very surprise. If they either equal or fast sometimes the 
> compiler did great optizations or it's just a multicore 
> processor that's helping or what else? the first version (from 
> your post, the one using ranges) change in each iteration two 
> pointers (in pop*() calls) and request r's length 3 times (in 
> .empty calls) while the second doesn't, just run until an 
> already know index (when enter in the loop) and access two 
> index in each iteration. This without consider the amount of 
> ifs.
>
> I don't know, maybe I just thinking in the C-way as that code 
> would run.

Yes, I'm curious about this too. I will check the assembly output 
later (When I have free time) to understand what is happening and 
why popFront/Back are faster than a loop.

Matheus.