bytes

bytes.cs

using System;
using System.Diagnostics;
using System.IO;

namespace TestBytes
{
    class Program
    {
        static unsafe void Main(string[] args)
        {
            var bd1 = File.ReadAllBytes(@"I:\Tools\scala-SDK-4.1.0-vfinal-2.11-win32.win32.x86_64.zip");
            var bd2 = File.ReadAllBytes(@"I:\Tools\scala-SDK-4.1.0-vfinal-2.11-win32.win32.x86_64.zip");
            var bd3 = File.ReadAllBytes(@"I:\Tools\scala-SDK-4.1.0-vfinal-2.11-win32.win32.x86_64.zip");

   
            var stopwatch = new Stopwatch();
            stopwatch.Start();

            CallByValue(bd1);

            stopwatch.Stop();
            Console.WriteLine(stopwatch.ElapsedMilliseconds);





            var stopwatch1 = new Stopwatch();
            stopwatch1.Start();

            fixed (byte* packet = bd2)
            {
                CallByPointer(packet, bd2.Length);
            }

            stopwatch1.Stop();
            Console.WriteLine(stopwatch1.ElapsedMilliseconds);




            var stopwatch2 = new Stopwatch();
            stopwatch2.Start();

            CallByReference(ref bd3);

            stopwatch2.Stop();
            Console.WriteLine(stopwatch2.ElapsedMilliseconds);


            Console.ReadKey();
        }

        public static void CallByValue(byte[] bytes)
        {
            for (var i = 0; i < bytes.Length; i++)
            {
                bytes[i] = bytes[i / 2 + 1];
                var t1 = bytes[i] * 2 - 100;
                var t2 = t1 + bytes[i] * 2 - 100;
                var t3 = bytes[i] * 2 - 100 - t2 / 2;
            }
        }

        public static void CallByReference(ref byte[] bytes)
        {
            for (var i = 0; i < bytes.Length; i++)
            {
                bytes[i] = bytes[i / 2 + 1];
                var t1 = bytes[i] * 2 - 100;
                var t2 = t1 + bytes[i] * 2 - 100;
                var t3 = bytes[i] * 2 - 100 - t2/2;
            }
        }

        public static unsafe void CallByPointer(byte* bytes, int len)
        {
            //byte[] b = new byte[len];
            //Marshal.Copy((IntPtr)bytes, b, 0, len);
            
            for (var i = 0; i < len; i++)
            {
                bytes[i] = bytes[i / 2 + 1];
                var t1 = bytes[i] * 2 - 100;
                var t2 = t1 + bytes[i] * 2 - 100;
                var t3 = bytes[i] * 2 - 100 - t2 / 2;
            }
        }
    }
}