ch-ch-changes

[Walter Bright]

bearophile wrote:
> grauzone:
>> Why did you choose to do it like this? Because it is shorter, or
>> for performance (avoid delegate call)?
> 
> I agree with the general points you have made. Alex has used aliases
> for performance.
> 
> My dlibs (for D1) use closures, I like them. Extensive benchmarking
> of mine have shown me they are often fast enough. In the spots of the
> program where you need max performance I just don't use them, and I
> use normal D code. The good thing is that such critical spots are
> often 2-5-20% of the lines of the whole program, so for me improving
> safety and syntax was a win.

It is hard to hit just the right tradeoff between performance and 
simplicity. One motivating issue, however, is we don't want to leave an 
excuse or desire to go back to C or C++ for performance reasons, even if 
those reasons are not reality.

On the other hand, I really like the string mixin approach, I think it 
works simply and elegantly for most predicates.