using System;

using System.Linq.Expressions;

using System.Diagnostics;

​

public class E

{

    public double V { get; set; }

}

​

public class Program

{

    public static void Main()

    {

        E e = new E();

        Func<double> f = () => e.V;

        Expression expr = Expression.Property(Expression.Constant(e), "V");

        Expression<Func<double>> exp = Expression.Lambda<Func<double>>(expr);

        Func<double> ef = exp.Compile();

        e.V = 123;

        int attempts = 5;

        for (int j = 0; j < attempts; j++)

        {

            int c = 100000;

            double[] r1 = new double[c];

            Stopwatch sw = new Stopwatch();

            sw.Start();

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

            {

                r1[i] = f();

            }

            sw.Stop();

            double[] r2 = new double[c];

            Stopwatch sw2 = new Stopwatch();

            sw2.Start();

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

            {

                r2[i] = ef();

            }

            sw2.Stop();

            double rat = (double)sw.ElapsedTicks / sw2.ElapsedTicks;

            Console.WriteLine(rat);

        }

    }

}