Background: The author of this proposal, Daniel Micay (a.k.a. strcat, a.k.a. thestinger), is the most prolific volunteer contributor to the Rust compiler [1], and is fairly obsessed with eliminating design hazards that could lead to Rust not being competitive with C++ in terms of performance. For example, he was the driving force behind Rust's recent widespread switch from internal iterators to external iterators, and wrote most of the external iterator libraries himself.

[1] https://github.com/mozilla/rust/graphs/contributors

EDIT: To whoever removed the [Rust-dev] annotation from the title of this submission, please put it back. It adds valuable context, and it's in the title of the page itself, so you're violating HN's naming policy by removing it.