Multi Core Programming using Task Parallel Library with .NET 4.0

using System;
using System.Diagnostics;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    internal class Program
    {
        private static void Main()
        {
            var watch = new Stopwatch();

            const int maxWaitHandleWaitAllAllowed = 64;
            var mres = new ManualResetEventSlim[maxWaitHandleWaitAllAllowed];

            for (var i = 0; i < mres.Length; i++)
            {
                mres[i] = new ManualResetEventSlim(false);
            }


            watch.Start();

            //start a new classic Thread and signal the ManualResetEvent when its done
            //so that we can snapshot time taken, and 

            for (var i = 0; i < mres.Length; i++)
            {
                var idx = i;
                var t = new Thread(state =>
                                       {
                                           for (var j = 0; j < 10; j++)
                                           {
                                               Console.WriteLine(string.Format("Thread : {0}, outputing {1}",
                                                                               state.ToString(), j.ToString()));
                                           }
                                           mres[idx].Set();
                                       });
                t.Start(string.Format("Thread{0}", i));
            }

            WaitHandle.WaitAll((from x in mres select x.WaitHandle).ToArray());

            var threadTime = watch.ElapsedMilliseconds;
            watch.Reset();

            foreach (ManualResetEventSlim t in mres)
            {
                t.Reset();
            }

            watch.Start();

            for (var i = 0; i < mres.Length; i++)
            {
                var idx = i;
                Task.Factory.StartNew(state =>
                                                      {
                                                          for (var j = 0; j < 10; j++)
                                                          {
                                                              Console.WriteLine(
                                                                  string.Format("Task : {0}, outputing {1}",
                                                                                state.ToString(), j.ToString()));
                                                          }
                                                          mres[idx].Set();
                                                      }, string.Format("Task{0}", i));
            }

            WaitHandle.WaitAll((from x in mres select x.WaitHandle).ToArray());
            var taskTime = watch.ElapsedMilliseconds;

            Console.ForegroundColor = ConsoleColor.Green;
            Console.WriteLine("Traditional Thread Approach   : {0}ms", threadTime);
            Console.WriteLine("Task Parallel Library Approach: {0}ms", taskTime);
            Console.ForegroundColor = ConsoleColor.White;

            foreach (var t in mres)
            {
                t.Reset();
            }
        }
    }
}