[jrvidal]

I'm not sure that's correct. `UnsafeCell` is a Rust lang item that might disable some optimizations, I think?

https://doc.rust-lang.org/src/core/cell.rs.html#1483

[simias]

You're right, I just saw that. Well I least I learned something new about Rust today!

[aratakareigen]

Yep, you can't implement UnsafeCell yourself without running into undefined behavior.