parallel bench mark

ParallelBench

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections.Concurrent;
using System.Diagnostics;
using System.IO;


namespace GameOfSums
{
    class Program
    {
        static void Main(string[] args)
        {

            int numberOfIterations = 1000;
            IList<double> runsNonParallel = new List<double>();
            IList<double> runsParallel = new List<double>();

            for (int interation = 0; interation != numberOfIterations; interation++)
            {
                using (var watch = new CountDownClock())
                {
                    foreach (var file in Directory.GetFiles(@"C:\Windows\System32"))
                    {
                        GetFileSize(file);
                    }

                    var elapsed = watch.GetElapsed();
                    runsNonParallel.Add(elapsed.TotalMilliseconds);
                  
                }


                using (var watch = new CountDownClock())
                {
                    IList<string> files = Directory.GetFiles(@"C:\Windows\System32");

                    Parallel.ForEach(files, (workItem) =>
                    {
                        var x = new FileInfo(workItem).Length;
                    });
                    var elapsed = watch.GetElapsed();
                    runsParallel.Add(elapsed.TotalMilliseconds);
                    
                }

            }


            Console.WriteLine("Statistics");
            Console.WriteLine("{0} Total Runs", numberOfIterations);
            Console.WriteLine("{0} Min Non-Parallel [Fastest Run]", runsNonParallel.Min());
            Console.WriteLine("{0} Max Non-Parallel [Slowest Run]", runsNonParallel.Max());
            Console.WriteLine("{0} Avg Run", runsNonParallel.Average());


            Console.WriteLine("{0} Min Parallel [Fastest Run]", runsParallel.Min());
            Console.WriteLine("{0} Max Parallel [Slowest Run]", runsParallel.Max());
            Console.WriteLine("{0} Avg Run", runsParallel.Average());

            Console.ReadLine();
        }

        static long GetFileSize(string fileName)
        {
            return new FileInfo(fileName).Length;
        }

    }


    public class CountDownClock : IDisposable
    {
        Stopwatch watch = new Stopwatch();

        public CountDownClock()
        {
            watch.Start();
        }

        public TimeSpan GetElapsed()
        {
            return watch.Elapsed.Duration();
        }


        public void Dispose()
        {
            watch.Stop();
        }
    }

}