About two weeks to get the majority of language features - iterators, some aspects of ownership, structs, stop fighting the borrow checker for the common cases.

About two weeks to get the majority of language features - iterators, some aspects of ownership, structs, stop fighting the borrow checker for the common cases. I was using threads to parallelize my work within the first few days, and that was particularly cool for me. I'd say another two weeks before I was using lifetimes properly, traits, enums, etc in 'idiomatic' ways. All in all, 4 weeks before I felt productive. I come from C++, which helped and hurt. On the one hand, move semantics weren't new - but C++ move semantics felt like nothing* compared to Rust's. It actually really helped me internalize why you would want them in C++. I knew that returning a pointer to the stack was bad in C++. In rust, I actually started doing that (just parent stacks), but safely. * Such as self.foo(&self.bar)