Пример надуманный но все же.

Rust:
rustc -C opt-level=3 -l static=num -L. main.rs
real    0m2.168s
user    0m2.163s
sys     0m0.005s

Go:
go build main.go
real    1m18.388s
user    1m18.342s
sys     0m0.092s

//num.c
int print_num(int num) {
    return num * 2;
}

//main.go
func main() {
        res := 0
        for i := 0; i < 1000_000_000; i++ {
                res = int(C.print_num(C.int(i)))
        }
        fmt.Println(res)
}

//main.rs
fn main() {
    let mut x: i32 = 0;
    for i in 0..1000_000_000 {
        unsafe {
            x = print_num(i);
        }
    }
    println!("{}", x);
}