[estebank]

> Zig vs Rust also shows up with how object destruction is handled.

I often hear critiques of Drop being less efficient for anything Arena-like, where batch destruction would be better, and holding that as the reason defer is a better approach. What is not mentioned there is that there's nothing stopping you from having both. In Rust you can perform batch destruction by having additional logic (it might require control of the container and its contents' types for easiest implementation), but the default behavior remains sane.

[smj-edison]

That's fair, since you can leak the box. I will say though it's not as ergonomic as defer, as defer handles all exits from the scope, where it's trickier to juggle destructors. Though on further thought, I suppose the arena can have Drop.

EDIT: What you can't really do is this: https://github.com/smj-edison/zicl/blob/ea8b75a1284e5bd5a309...

Here I'm able to swap out std.MultiArrayList's backing to be backed by virtual memory, and correctly clean it up. I'm not sure you can really do that with Rust, barring making custom data structures for everything.