Beginner and Rc () and also Arc()

[jbe]

In past I had this opinion:

@jbe

• Structs like Cell, RefCell, Arc, etc. are seldom needed, but if you need them, it does help if you already know them well (and know how to use them). So if you start learning with The Rust Book, don't skip these topics.

But seeing this video …

@rustart

The Importance of Not Over-Optimizing in Rust

… I wonder if my p.o.v. is a pretty individual thing. I like to find solutions where unnecessary allocations are avoided (e.g. here) and then I sometimes find myself spending hours and hours on finding the optimal type signatures for my problem. A real time killer. It's fun but I see how this lowers my productivity, at least in the short term (though I learn a lot about Rust but this seems endless).

So using Rc, hmmmm… I would probably only use it where ownership isn't clear, i.e. where a value is "owned" by several structs or locals. Adding Rc everywhere might make type signatures also a bit complex and difficult to overlook.