using System;

using System.Diagnostics;

public class Program

{

    private static long Benchmark(Action act, int iterations)

    {

        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((sw.ElapsedTicks).ToString());

        return sw.ElapsedTicks;

    }

​

    public static void Main(string[] args)

    {

        var empty = Benchmark(() => { }, 1000000);

        var literal = Benchmark(() => { var x = 1E-3; }, 1000000);

        var pow = Benchmark(() => { var x = Math.Pow(10, -3); }, 1000000);

        Console.WriteLine("Variable assignment for numeric literal is {0} times faster then the same with Math.Pow", (double)(pow - empty) / (double)(literal - empty));

    }   

}