Such cache line will (because it is adjancent to the refcounted data) almost always be in cache anyway. Rust's refcounting is much cheaper than C++'s refcountin

Such cache line will (because it is adjancent to the refcounted data) almost always be in cache anyway. Rust's refcounting is much cheaper than C++'s refcounting because it doesn't need to be atomic. (There is a separate type for atomic RC, and it is enforced by the compiler that you use it when needed.)