On Wednesday, 15 June 2016 at 17:02:11 UTC, rikki cattermole
wrote:
Higher level languages like Java have the benefit of using
pools and optimizing for this usage pattern, D does and will
never have this.
Why don't you want the same for D?
Well if you really insist to have a String class don't be too
surprised for some reason it doesn't have the same performance
to say Java.
Some areas, like compiling, or producing HTML/XML/JSON documents,
manipulate strings a lot.
Other areas, like GUI editors for sufficiently complex documents,
or level editors for videogame, need to efficiently manipulate
huge trees of assorted small objects, not necessarily strings.
Aka don't go around creating/destroying classes a huge amount
unless you have rolled some form of memory management policy
such as reserving memory for the GC to use.
Yeah, that’s what I regularly do in C++ when I need to
efficiently create/destroys many small objects. Sure, this
typically leads to the best performance, e.g. because I can make
the memory layout as cache friendly as humanly possible.
But not all projects need that. And even for very performance
demanding apps, not all components of the app need that.
For such cases, a good GC (that just works well out of the box
like .NET's GC does) can reduce development costs significantly.
