A design goal of Rust is to target the performance of well-written, safe C++. It doesn't (today) even ship with a garbage collector, discourages heap allocation (which is your only option in normal Go), and avoids dynamic dispatch in the vast majority of cases. In contrast, idiomatic Go code is garbage collected, heap allocation heavy, and dynamic dispatch heavy.
That isn't always going to mean that Rust code is faster, but for benchmark games like this, when Rust is slower it almost always means that the benchmark is wrong.
That isn't always going to mean that Rust code is faster, but for benchmark games like this, when Rust is slower it almost always means that the benchmark is wrong.