[swift-evolution] [swift-users] How does "Sequence.joined" work?

[Daniel Vollmer]

> On 9. Aug 2017, at 06:51, Taylor Swift via swift-users <swift-users at swift.org> wrote:
> 
> It’s possible to implement a classic red-black tree in Swift that performs better than a sorted Array, down to about n = 1,500 items, not n = 100,000 items as it claims. (Actually, heap allocators these days are good enough that performance is on par with Array all the way down to n = 1.)

I’m not sure how that can be because you lose locality (but that probably depends on what operations “perform” includes). And IMO, heap allocations remain (and will remain) a bottleneck for small allocations.

	Daniel.