Reflection is Slow or Fast? A Practical Demo


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using DummyNamespace;
using System.Linq.Expressions;

namespace ReflectionTest
{
    class Program
    {
        static void Main(string[] args)
        {
            DateTime currentTime;
            ReflectionCalculator calculator = new ReflectionCalculator();
            Console.WriteLine("Time Now : {0}", DateTime.Now.ToLocalTime());
            currentTime = DateTime.Now;

            for (int i = 0; i < 100000; i++)
            {
                calculator.NormalCall(i);
            }

            TimeSpan spannedtime = DateTime.Now.Subtract(currentTime);
            Console.WriteLine("Time Elapsed for Normal call : {0}", spannedtime.TotalMilliseconds);

            currentTime = DateTime.Now;
            for (int i = 0; i < 100000; i++)
            {
                calculator.ReflectionBasedCall(i);
            }
            spannedtime = DateTime.Now.Subtract(currentTime);
            Console.WriteLine("Time Elapsed for Reflection call : {0}", spannedtime.TotalMilliseconds);

            currentTime = DateTime.Now;
            for (int i = 0; i < 100000; i++)
            {
                calculator.CacheBasedDelegateCall(i);
            }
            spannedtime = DateTime.Now.Subtract(currentTime);
            Console.WriteLine("Time Elapsed for CacheBased call : {0}", spannedtime.TotalMilliseconds);

            Console.ReadLine();
        }
    }
}