Please provide better manners than those in your comments. :)
It isn't bad manners to ask Rusky or pcwalton to show measurements in support of their claims.
It isn't bad manners to trust that when steveklabnik answers "No, as optimizing performance hasn't been a focus, shipping good language semantics has been." that's what he means.
https://news.ycombinator.com/item?id=9554676
edit: Please provide a better response than downmods.