unsafe perf

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

namespace UnsafePerformance
{
    class Program
    {
        static void Main(string[] args)
        {
            int bufferSize = 8000;
            int numberOfIterations = 10000;

            byte[] buf = new byte[bufferSize];
            for (int i2 = 0; i2 < bufferSize; i2++) buf[i2] = (byte)(i2 % 256);
            Stopwatch sw = new Stopwatch();

            int i = 0;
            int cnt = 0;

            while (true)
            {
                cnt = 0;
                sw.Restart();
                for (i = 0; i < numberOfIterations; i++)
                    for (int j = 0; j < buf.Length; j++) cnt += buf[j];
                sw.Stop();
                Console.WriteLine(sw.Elapsed);

                unsafe
                {
                    cnt = 0;
                    sw.Restart();
                    for (i = 0; i < numberOfIterations; i++)
                        for (int j = 0; j < buf.Length; j++) cnt += buf[j];
                    sw.Stop();
                    Console.WriteLine(sw.Elapsed);

                    fixed (byte* ptr = buf)
                    {
                        cnt = 0;
                        sw.Restart();
                        for (i = 0; i < numberOfIterations; i++)
                            for (byte* j = ptr, lim = ptr + bufferSize; j < lim; j++) cnt += *j;
                        sw.Stop();
                        Console.WriteLine(sw.Elapsed);
                    }

                }

                Console.ReadLine();
            }
        }
    }
}