using System;

using System.Linq.Expressions;

using System.Diagnostics;

using Dynamitey;

public class Program

{

    public static int Multiply(int x) { return x * 5; }

    public static void Main()

    {

     // Create a parameter expression representing an input parameter

     ParameterExpression parameter = Expression.Parameter(typeof(int), "x");

​

     // Create a body expression representing an arithmetic operation

     BinaryExpression multiplication = Expression.Multiply(parameter, Expression.Constant(5));

​

     // Create a lambda expression with the parameter and the body expression

     LambdaExpression lambda = Expression.Lambda(multiplication, parameter);

​

     // Compile the lambda expression to a delegate

     Func<int, int> multiplyByFive = (Func<int, int>)lambda.Compile();

​

     multiplyByFive(10);

     Multiply(10);

     //Invoke the compiled delegate

     Stopwatch watch = new Stopwatch();

     watch.Start();

     for (int i = 0; i < 1000000; i++)

     {

         multiplyByFive.Invoke(10);

     }

     watch.Stop();

     Console.WriteLine("Invoke: " + watch.ElapsedMilliseconds + "ms");

​

     Stopwatch watch2 = new Stopwatch();

     watch2.Start();

     for (int i = 0; i < 1000000; i++)

     {

         multiplyByFive.DynamicInvoke(10);

     }

     watch2.Stop();

     Console.WriteLine("DynamicInvoke: " + watch2.ElapsedMilliseconds + "ms");

     multiplyByFive = Multiply;

     Stopwatch watch3 = new Stopwatch();

     watch3.Start();

     for (int i = 0; i < 1000000; i++)

     {

         multiplyByFive.Invoke(10);

     }

     watch3.Stop();

     Console.WriteLine("Invoke(pre-compiled): " + watch3.ElapsedMilliseconds + "ms");

     Stopwatch watch4 = new Stopwatch();

     watch4.Start();

     for (int i = 0; i < 1000000; i++)

     {

         multiplyByFive.DynamicInvoke(10);

     }

     watch4.Stop();

     Console.WriteLine("DynamicInvoke(pre-compiled): " + watch4.ElapsedMilliseconds + "ms");

    }

}