[coldtea]

>Also, zero-cost abstraction is likely the biggest bullshit I've ever heard, there is a lot of cost and there's also a lot of waiting for compiler if you're using cargo packages.

"(...) there are two factors that make something a proper zero cost abstraction:

No global costs: A zero cost abstraction ought not to negatively impact the performance of programs that don’t use it. For example, it can’t require every program carry a heavy language runtime to benefit the only programs that use the feature.

Optimal performance: A zero cost abstractoin ought to compile to the best implementation of the solution that someone would have written with the lower level primitives. It can’t introduce additional costs that could be avoided without the abstraction."

https://boats.gitlab.io/blog/post/zero-cost-abstractions/

It's not about compile time...