C＃方法 - 比代碼更快地調用

我想通過將代碼放入方法而不是僅僅調用它來測試丟失了多少時間。C＃方法 - 比代碼更快地調用

令我驚訝的是，方法調用速度更快，我問自己：爲什麼？

這是代碼：的HObjects是圖像處理庫「的Halcon」的一部分，並且非常普遍地與「出」的方法調用中使用，所以不要對恐怖的樣子;-)

static void Main(string[] args) 
    { 
     int runs = 900000; 
     HObject hob1; 
     HObject hob2; 
     HObject hob3; 
     HObject hob4; 
     HObject hob5; 
     HObject hob6; 

     DateTime t1 = DateTime.Now; 

     for (int i = 0; i < runs; i++) 
     { 
      doItMethod(out hob1, out hob2, out hob3, out hob4, out hob5, out hob6); 
     } 

     TimeSpan ts1 = TimeSpan.FromTicks(DateTime.Now.Ticks - t1.Ticks); 

     DateTime t2 = DateTime.Now; 

     for (int i = 0; i < runs; i++) 
     { 
      HOperatorSet.GenEmptyObj(out hob1); 
      HOperatorSet.GenEmptyObj(out hob2); 
      HOperatorSet.GenEmptyObj(out hob3); 
      HOperatorSet.GenEmptyObj(out hob4); 
      HOperatorSet.GenEmptyObj(out hob5); 
      HOperatorSet.GenEmptyObj(out hob6); 

      hob1.Dispose(); 
      hob2.Dispose(); 
      hob3.Dispose(); 
      hob4.Dispose(); 
      hob5.Dispose(); 
      hob6.Dispose(); 
     } 

     TimeSpan ts2 = TimeSpan.FromTicks(DateTime.Now.Ticks - t2.Ticks); 

     Console.WriteLine("Zeitspanne Methodenaufruf : " + ts1.TotalMilliseconds.ToString()); 
     Console.WriteLine("Zeitspanne direkter Aufruf: " + ts2.TotalMilliseconds.ToString()); 

     Console.ReadKey(); 
    } 


    static void doItMethod(out HObject hobOut1, out HObject hobOut2, out HObject hobOut3, out HObject hobOut4, out HObject hobOut5, out HObject hobOut6) 
    { 
     HOperatorSet.GenEmptyObj(out hobOut1); 
     HOperatorSet.GenEmptyObj(out hobOut2); 
     HOperatorSet.GenEmptyObj(out hobOut3); 
     HOperatorSet.GenEmptyObj(out hobOut4); 
     HOperatorSet.GenEmptyObj(out hobOut5); 
     HOperatorSet.GenEmptyObj(out hobOut6); 

     hobOut1.Dispose(); 
     hobOut2.Dispose(); 
     hobOut3.Dispose(); 
     hobOut4.Dispose(); 
     hobOut5.Dispose(); 
     hobOut6.Dispose(); 
    }

憂

來源

2012-09-12 Otterprinz

我有一個懷疑：這是一個GC神器。要驗證它，請交換電話：首先測試「direkter AUfruf」（直接呼叫），然後THEN方法調用並重新發布。 –

發現你自己的'Stopwatch'類（http://msdn.microsoft.com/en-us/library/system.diagnostics.stopwatch.aspx）。差異是否相當大（請發佈時間值）？什麼構建你測試過的配置（調試或發佈）？ – Dennis

C＃編譯器優化代碼，這可能是原因，但您必須使用秒錶類 – opewix

您應該使用Stopwatch

//add using System.Diagnostics; 

public static void Main() 
    { 
     int runs = 900000; 
     HObject hob1; 
     HObject hob2; 
     HObject hob3; 
     HObject hob4; 
     HObject hob5; 
     HObject hob6; 

     Stopwatch t1 = new Stopwatch(); 

     t1.Start(); 

     for (int i = 0; i < runs; i++) 
     { 
      doItMethod(out hob1, out hob2, out hob3, out hob4, out hob5, out hob6); 
     } 

     t1.Stop(); 


     Stopwatch t2 = new Stopwatch(); 
     t2.Start(); 

     for (int i = 0; i < runs; i++) 
     { 
      HOperatorSet.GenEmptyObj(out hob1); 
      HOperatorSet.GenEmptyObj(out hob2); 
      HOperatorSet.GenEmptyObj(out hob3); 
      HOperatorSet.GenEmptyObj(out hob4); 
      HOperatorSet.GenEmptyObj(out hob5); 
      HOperatorSet.GenEmptyObj(out hob6); 

      hob1.Dispose(); 
      hob2.Dispose(); 
      hob3.Dispose(); 
      hob4.Dispose(); 
      hob5.Dispose(); 
      hob6.Dispose(); 
     } 
     t2.Stop(); 



     Console.WriteLine("Zeitspanne Methodenaufruf : " + t1.ElapsedMilliseconds); 
     Console.WriteLine("Zeitspanne direkter Aufruf: " + t2.ElapsedMilliseconds); 

     Console.ReadKey(); 
    }

來源

2012-09-12 09:09:53

我用秒錶得到正確的結果：

Method: 00:00:04.5573170 
Code: 00:00:04.5539918 



static void Main(string[] args) 
    { 
     int runs = 1000; 
     HObject hob1; 
     HObject hob2; 
     HObject hob3; 
     HObject hob4; 
     HObject hob5; 
     HObject hob6; 

     Stopwatch sw = new Stopwatch(); 
     sw.Start(); 

     for (int i = 0; i < runs; i++) 
     { 
      doItMethod(out hob1, out hob2, out hob3, out hob4, out hob5, out hob6); 
     } 

     sw.Stop(); 
     Console.WriteLine(sw.Elapsed); 

     sw = Stopwatch.StartNew(); 

     for (int i = 0; i < runs; i++) 
     { 
      HOperatorSet.GenEmptyObj(out hob1); 
      HOperatorSet.GenEmptyObj(out hob2); 
      HOperatorSet.GenEmptyObj(out hob3); 
      HOperatorSet.GenEmptyObj(out hob4); 
      HOperatorSet.GenEmptyObj(out hob5); 
      HOperatorSet.GenEmptyObj(out hob6); 

      hob1.Dispose(); 
      hob2.Dispose(); 
      hob3.Dispose(); 
      hob4.Dispose(); 
      hob5.Dispose(); 
      hob6.Dispose(); 
     } 

     sw.Stop(); 
     Console.WriteLine(sw.Elapsed); 

     Console.ReadKey(); 
    }

來源

2012-09-12 09:12:07 opewix

你應該編輯你的問題，而不是張貼這個答案。這樣一來，那些試圖幫助你的人就會更加清楚。 – Koen

謝謝大家！我得到了我的答案。

正如Eugen Rieck懷疑的那樣，這是一個GC-Artifact。

執行垃圾收集使方法調用版本比直接代碼慢。

來源

2012-09-12 09:19:15 Otterprinz

C＃方法 - 比代碼更快地調用

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