[HervalFreire]

There is a reference counting GC in rust. It's just not default and you have to be explicit about invoking it. It's similar to shared pointers in C++. See Arc.

For something like python the heap allocation or stack allocation is handled behind the scenes so the entire concept is abstracted away from you.

[vlovich123]

I meant a tracing GC like https://docs.rs/gc/latest/gc/.

Arc still requires you to reason about ownership as does this GC.

I think single threaded async w/ easy no copy message passing is more akin to what most people want when thinking about concurrency (eg Go channels) and actually happens to perform exceedingly well when it’s done up and down the stack (eg io_uring). In such a model you don’t even need to worry about ownership so much because you can’t Send anything except for things that need to be so there’s not a lot of value in many of the protections Rust tries to put in place.