Performance comparison: Node, Python, C#

perf.cs

using System;
using System.Diagnostics;

namespace ConsoleApplication13
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = 10000000;
            Stopwatch sw = new Stopwatch();

            sw.Start();
            for (int i = 0; i < N; i++)
            {
                i += 1;
            }
            sw.Stop();

            Console.WriteLine("delta: " + sw.Elapsed.TotalMilliseconds * Math.Pow(10, 6) + " ns");

            // debug build:   20589300 ns
            // release build: 3361400 ns
        }
    }
}

perf.js

var N = 10000000;

before = process.hrtime();
for (var i = 0; i < N; i++) {
    i += 1;
}
after = process.hrtime();
delta = [0,0];
delta[0] = after[0] - before[0];
delta[1] = after[1] - before[1];
console.log('time taken: ' + delta[0] + ' sec ' + delta[1] + ' ns ');

// 12014989ns

perf.py

from time import clock

N = 10000000
ii = range(N)
before = clock()
for i in ii:
    i += 1

after = clock()
print "time delta (ns)", (after - before) * (10**9)

# -OO: 1195017886.8  ns
#      1297932076.95 ns