using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            textBox1.AppendText("test start" + Environment.NewLine);
            this.hoge1();
            this.hoge2();
            this.hoge3();
            this.hoge4();
        }

        void hoge1()
        {
            Stopwatch sw = new Stopwatch();
            sw.Reset();
            sw.Start();
            for (int i = 0; i < 10; i++)
            {
                for (int r = 0; r < 100000; r++)
                {
                    int R = r / 4; if (r % 4 == 1) R++;
                    int G = r / 4; if (r % 4 == 2) G++;
                    int B = r / 4; if (r % 4 == 3) B++;
                }
            }
            sw.Stop();
            textBox1.AppendText(
                ((double)sw.ElapsedTicks
                  / (double)Stopwatch.Frequency).ToString()
                  + Environment.NewLine);
        }
        void hoge2()
        {
            Stopwatch sw = new Stopwatch();
            sw.Reset();
            sw.Start();
            for (int i = 0; i < 10; i++)
            {
                for (int r = 0; r < 100000; r++)
                {
                    int R = r >> 2; if ((r & 0x3) == 1) R++;
                    int G = r >> 2; if ((r & 0x3) == 2) G++;
                    int B = r >> 2; if ((r & 0x3) == 3) B++;
                }
            }
            sw.Stop();
            textBox1.AppendText(
                ((double)sw.ElapsedTicks
                  / (double)Stopwatch.Frequency).ToString()
                  + Environment.NewLine);
        }
        void hoge3()
        {
            Stopwatch sw = new Stopwatch();
            sw.Reset();
            sw.Start();
            for (int i = 0; i < 10; i++)
            {

                for (int r = 0; r < 100000; r++)
                {
                    int R = r / 4 + (r + 3) % 4 / 3;
                    int G = r / 4 + (r + 2) % 4 / 3;
                    int B = r / 4 + (r + 1) % 4 / 3;
                }
            }
            sw.Stop();
            textBox1.AppendText(
                ((double)sw.ElapsedTicks
                  / (double)Stopwatch.Frequency).ToString()
                  + Environment.NewLine);
        }
        void hoge4()
        {
            Stopwatch sw = new Stopwatch();
            sw.Reset();
            sw.Start();
            for (int i = 0; i < 10; i++)
            {
                for (int r = 0; r < 100000; r++)
                {
                    int R = (r >> 2) + ((r + 3) & 0x3) / 3;
                    int G = (r >> 2) + ((r + 2) & 0x3) / 3;
                    int B = (r >> 2) + ((r + 1) & 0x3) / 3;
                }
            }
            sw.Stop();
            textBox1.AppendText(
                ((double)sw.ElapsedTicks
                  / (double)Stopwatch.Frequency).ToString()
                  + Environment.NewLine);
        }
    }
}