[Gajurgensen]

> Rust achieves impressive numbers with the most obvious approach. This is super cool. I feel that this behavior should be the goal for any language offering these kinds of higher order functions as part of the language or core library.

Certainly it should be a goal, but I don't think it should be the goal. Higher levels of abstraction aren't typically motivated by performance. The priority is ease of expression and reasoning about code. Of course both are desirable, but when the two are in conflict and a trade off is necessary, designers will lean toward expressive abstractions, not performant abstractions. After all, performance is already available without the abstractions.

But I do agree it is super cool how Rust finds a sweet spot between performance and expressibility. It is one of my favorite languages for that reason. I just don't think it should be a universal goal.