Unbuffered range interface

[Ola Fosheim Grøstad" <ola.fosheim.grostad+dlang at gmail.com>]

On Wednesday, 26 March 2014 at 00:55:31 UTC, Andrei Alexandrescu 
wrote:
> The recent discussion initiated by Walter points to a problem 
> known since a long time ago: ranges are well modeled by objects 
> in memory (arrays, lists, other containers) but poorly by 
> objects that need to load or construct elements on the fly.

If you want to support web servers you should also consider 
scenarios where you retrieve ranges from a distributed database 
and the data arrive out-of-order. You can cut down on latency by 
processing map() etc out-of-order.