Performance of ranges verses direct

[Marco Leise]

Am Wed, 11 Dec 2013 17:40:39 +0100
schrieb Joseph Rushton Wakeling <joseph.wakeling at webdrake.net>:

> On 11/12/13 11:10, John Colvin wrote:
> > A lot of the performance loss is down to missed optimisations, in particular
> > inlining.
> 
> Simple example:
> 
>      foreach(i; iota(0, 10)) { ... }
> 
> should be as fast as
> 
>      foreach(i; 0 .. 10) { ... }
> 
> but isn't.  I remember Andrei noting that this ought to be easily fixable [*], 
> but I don't know if that actually happened, because I haven't compared the two 
> recently.

As far as I remember it *is* the same speed using GDC or LDC.
But as long as this issue remains with DMD I'm confident that
foreach_reverse(i; 0 .. 10)  will stay :)

-- 
Marco