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  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Data;
  5. using System.Drawing;
  6. using System.Linq;
  7. using System.Text;
  8. using System.Windows.Forms;
  9. using System.Diagnostics;
  10.  
  11. namespace WindowsFormsApplication1
  12. {
  13.     public partial class Form1 : Form
  14.     {
  15.         public Form1()
  16.         {
  17.             InitializeComponent();
  18.         }
  19.         private void Form1_Load(object sender, EventArgs e)
  20.         {
  21.  
  22.         }
  23.  
  24.         private void button1_Click(object sender, EventArgs e)
  25.         {
  26.             textBox1.AppendText("test start" + Environment.NewLine);
  27.             this.hoge1();
  28.             this.hoge2();
  29.             this.hoge3();
  30.             this.hoge4();
  31.         }
  32.  
  33.         void hoge1()
  34.         {
  35.             Stopwatch sw = new Stopwatch();
  36.             sw.Reset();
  37.             sw.Start();
  38.             for (int i = 0; i < 10; i++)
  39.             {
  40.                 for (int r = 0; r < 100000; r++)
  41.                 {
  42.                     int R = r / 4; if (r % 4 == 1) R++;
  43.                     int G = r / 4; if (r % 4 == 2) G++;
  44.                     int B = r / 4; if (r % 4 == 3) B++;
  45.                 }
  46.             }
  47.             sw.Stop();
  48.             textBox1.AppendText(
  49.                 ((double)sw.ElapsedTicks
  50.                   / (double)Stopwatch.Frequency).ToString()
  51.                   + Environment.NewLine);
  52.         }
  53.         void hoge2()
  54.         {
  55.             Stopwatch sw = new Stopwatch();
  56.             sw.Reset();
  57.             sw.Start();
  58.             for (int i = 0; i < 10; i++)
  59.             {
  60.                 for (int r = 0; r < 100000; r++)
  61.                 {
  62.                     int R = r >> 2; if ((r & 0x3) == 1) R++;
  63.                     int G = r >> 2; if ((r & 0x3) == 2) G++;
  64.                     int B = r >> 2; if ((r & 0x3) == 3) B++;
  65.                 }
  66.             }
  67.             sw.Stop();
  68.             textBox1.AppendText(
  69.                 ((double)sw.ElapsedTicks
  70.                   / (double)Stopwatch.Frequency).ToString()
  71.                   + Environment.NewLine);
  72.         }
  73.         void hoge3()
  74.         {
  75.             Stopwatch sw = new Stopwatch();
  76.             sw.Reset();
  77.             sw.Start();
  78.             for (int i = 0; i < 10; i++)
  79.             {
  80.  
  81.                 for (int r = 0; r < 100000; r++)
  82.                 {
  83.                     int R = r / 4 + (r + 3) % 4 / 3;
  84.                     int G = r / 4 + (r + 2) % 4 / 3;
  85.                     int B = r / 4 + (r + 1) % 4 / 3;
  86.                 }
  87.             }
  88.             sw.Stop();
  89.             textBox1.AppendText(
  90.                 ((double)sw.ElapsedTicks
  91.                   / (double)Stopwatch.Frequency).ToString()
  92.                   + Environment.NewLine);
  93.         }
  94.         void hoge4()
  95.         {
  96.             Stopwatch sw = new Stopwatch();
  97.             sw.Reset();
  98.             sw.Start();
  99.             for (int i = 0; i < 10; i++)
  100.             {
  101.                 for (int r = 0; r < 100000; r++)
  102.                 {
  103.                     int R = (r >> 2) + ((r + 3) & 0x3) / 3;
  104.                     int G = (r >> 2) + ((r + 2) & 0x3) / 3;
  105.                     int B = (r >> 2) + ((r + 1) & 0x3) / 3;
  106.                 }
  107.             }
  108.             sw.Stop();
  109.             textBox1.AppendText(
  110.                 ((double)sw.ElapsedTicks
  111.                   / (double)Stopwatch.Frequency).ToString()
  112.                   + Environment.NewLine);
  113.         }
  114.     }
  115. }
  116.  
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https://ideone.com/o1mSO
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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