Covariant Override Test

gistfile1.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Threading;
using N;

static class Program
{
    static void Main()
    {
        const int COUNT = 100000000;

        C3 c3 = new C3();
        C2 c2 = c3;
        C1 c1 = c3;

        c1.M1();
        c1.M2();
        c1.M3();
        c1.M4();
        c2.M1();
        c2.M2();
        c2.M3();
        c2.M4();
        c3.M1();
        c3.M2();
        c3.M3();
        c3.M4();

        Process process = Process.GetCurrentProcess();
        process.ProcessorAffinity = new IntPtr(1);
        Thread.CurrentThread.Priority = ThreadPriority.Highest;

        Stopwatch sw = new Stopwatch();

        Console.Write("C1::M1: ");
        sw.Restart();
        for (int i = 0; i < COUNT; i++)
        {
            object result = c1.M1(); 
        }
        sw.Stop();
        Console.WriteLine(sw.Elapsed);

        Console.Write("C1::M2: ");
        sw.Restart();
        for (int i = 0; i < COUNT; i++)
        {
            object result = c1.M2();
        }
        sw.Stop();
        Console.WriteLine(sw.Elapsed);

        Console.Write("C1::M3: ");
        sw.Restart();
        for (int i = 0; i < COUNT; i++)
        {
            object result = c1.M3();
        }
        sw.Stop();
        Console.WriteLine(sw.Elapsed);

        Console.Write("C1::M4: ");
        sw.Restart();
        for (int i = 0; i < COUNT; i++)
        {
            object result = c1.M4();
        }
        sw.Stop();
        Console.WriteLine(sw.Elapsed);






        Console.Write("C2::M1: ");
        sw.Restart();
        for (int i = 0; i < COUNT; i++)
        {
            IConvertible result = c2.M1();
        }
        sw.Stop();
        Console.WriteLine(sw.Elapsed);

        Console.Write("C2::M2: ");
        sw.Restart();
        for (int i = 0; i < COUNT; i++)
        {
            IEquatable<int> result = c2.M2();
        }
        sw.Stop();
        Console.WriteLine(sw.Elapsed);

        Console.Write("C2::M3: ");
        sw.Restart();
        for (int i = 0; i < COUNT; i++)
        {
            IConvertible result = (IConvertible)c2.M3();
        }
        sw.Stop();
        Console.WriteLine(sw.Elapsed);

        Console.Write("C2::M4: ");
        sw.Restart();
        for (int i = 0; i < COUNT; i++)
        {
            IEquatable<int> result = (IEquatable<int>)c2.M4();
        }
        sw.Stop();
        Console.WriteLine(sw.Elapsed);






        Console.Write("C3::M1: ");
        sw.Restart();
        for (int i = 0; i < COUNT; i++)
        {
            string result = c3.M1();
        }
        sw.Stop();
        Console.WriteLine(sw.Elapsed);

        Console.Write("C3::M2: ");
        sw.Restart();
        for (int i = 0; i < COUNT; i++)
        {
            int result = c3.M2();
        }
        sw.Stop();
        Console.WriteLine(sw.Elapsed);

        Console.Write("C3::M3: ");
        sw.Restart();
        for (int i = 0; i < COUNT; i++)
        {
            string result = (string)c3.M3();
        }
        sw.Stop();
        Console.WriteLine(sw.Elapsed);

        Console.Write("C3::M4: ");
        sw.Restart();
        for (int i = 0; i < COUNT; i++)
        {
            int result = (int)c3.M4();
        }
        sw.Stop();
        Console.WriteLine(sw.Elapsed);
    }
}