Inlining Ref Functions

[grauzone]

> On second thought, maybe this should be a high priority issue, for two reasons.
> 
> 1.  Some uber-hardcore performance freaks will not even consider D if it has the
> slightest bit of performance overhead compared to C++.

I don't understand why D should pander to C++ freaks? If they think 
their language is great, they'll just continue programming C++. Nobody 
cares about them, and they will die a sad, lonely death.

Just look how Java/C# are taking over C++. Even if D is slightly less 
efficient, it won't interfere with D's world domination plans.

Rather, one should avoid cloning the more annoying C++ features. (Ah 
yes, of course D makes them "better". Huh.) That's why we all use D in 
the first place.

/random pointless rant

Of course, this doesn't have to do with DMD's optimizer. That said, if 
you want heavy optimization, you rather should look at LDC or GDC.