https://issues.dlang.org/show_bug.cgi?id=2504: reserve for associative arrays

[Era Scarecrow via Digitalmars-d]

On Wednesday, 2 November 2016 at 03:36:42 UTC, Andrei 
Alexandrescu wrote:
> Cons:
>
> * Built-in hashtables are a convenience facility more than a 
> high-performance one, so providing an efficiency-oriented 
> primitive seems a bit odd.

  I don't see why it would be odd.

  If I know my code is going to be working with 10,000,000 values, 
then telling/hinting so it could prepare appropriately up front 
rather than taking hits later seems useful. It's not like it 
couldn't work without it right?

  I'd hope for a few other features, like the AA could be 
pre-initialized and ready to go, for fixed/immutable lists.