Other languages may be more ergonomic or have more batteries included, but none of them can offer the holy grail of memory safety without garbage connection.
For example, OCaml is getting multicore and effects, and can serve almost as much HTTP requests as a Rust server based on Hyper. C# is getting performance improvements too, and lots of them.
It isn't discussed as much nowadays, because people more focus on the memory management side of Rust's benefit, but it was the reason Rust was designed in the first place, and it has no competitor in this area: if you need to do any kind of significant multi-threading in you application, then Rust is a game changer.
Do you have a link to a benchmark showing this?
I do feel that this benchmark is incomplete. I'd like it to see the results while using all of the cores of a machine, and I'd like to see different type of loads. I do think that the results are impressive: performance between Go and Rust is great. I do hope that it stays this way with multicore.