using System;

using System.Diagnostics;

public class Program

{

    private static void Benchmark(Action act, int iterations, string prefix)

    {

        GC.Collect();

        act.Invoke(); // run once outside of loop to avoid initialization costs

        Stopwatch sw = Stopwatch.StartNew();

        for (int i = 0; i < iterations; i++)

        {

            act.Invoke();

        }

        sw.Stop();

        Console.WriteLine(prefix + (sw.ElapsedTicks).ToString());

    }

​

    public static void Main(string[] args)

    {

        Benchmark(() => { 

            var a = 1.23;

            var b = Math.Pow(a, 2);

        }, 1000000, "Math.Pow():        ");

        Benchmark(() => { 

            var a = 1.23;

            var b = a * a;

        }, 1000000, "Multiplication:    ");

    }

}