[phaylon]

A `&str` is a borrow of the string slice data, and has borrowing semantics. An `std::sync::Arc<str>` on the other hand isn't borrowed but has shared ownership and is atomically reference counted.

Does that answer the question? Could you expand on what you mean by sharing `&str`?

[rmdashrfstar]

I suppose my question is what motivates the use of atomically referencing counting string slice rather than borrowing?

[phaylon]

You can store it independently without it being borrowed. So your structs don't need lifetimes.

I consider it a midpoint between `String` and `&str`. Most of the convenience of `String` (barring mutation) but less costly.