main.go

package main

import (
  "github.com/robertkrimen/otto"
)

func main() {
  vm := otto.New()
  vm.Run(`
    function fib(n) {
      if (n < 2) return n;
      return fib(n - 2) + fib(n - 1);
    }
    console.log(fib(30));
  `)
}

main.js

function fib(n) {
  if (n < 2) return n;
  return fib(n - 2) + fib(n - 1);
}

console.log(fib(30));

run.sh

> time go run main.go
832040
go run main.go  19.10s user 0.94s system 104% cpu 19.098 total

> go build main.go
> time ./main
832040
./main  18.88s user 0.91s system 105% cpu 18.827 total

> time node main.js
832040
node main.js  0.05s user 0.02s system 51% cpu 0.141 total