Fibonacci benchmark

fibo.js

const fibo = n => {
  if (n <= 1) {
    return n;
  }
  else {
    return fibo(n-1) + fibo(n-2);
  }
}

for (let n of process.argv.slice(2)) {
  console.log(`fibo(${n}) = ${fibo(n)}`);
}

fibo.py

import sys


def fibo(n):
    if n <= 1:
        return n
    else:
        return fibo(n-1) + fibo(n-2)


if __name__ == '__main__':
    for n in sys.argv[1:]:
        print(n, fibo(int(n)))

fibo.rs

use std::env;

pub fn fibo(n: u32) -> u32 {
    match n {
        0 => 0,
        1 => 1,
        _ => fibo(n - 1) + fibo(n - 2),
    }
}

pub fn main() {
    let args: Vec<String> = env::args().skip(1).collect();
    for arg in args.iter() {
        let n: u32 = arg.parse().unwrap();
        println!("fibo({}) = {}", n, fibo(n));
    }
}