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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Diagnostics;
  4. using System.Linq;
  5. using System.Text;
  6.  
  7. namespace ThrowPerf
  8. {
  9.     class Program
  10.     {
  11.         static void Main(string[] args)
  12.         {
  13.             var stp = new Stopwatch();
  14.             stp.Start();
  15.  
  16.             for (var i = 0; i < 10000; i++)
  17.             {
  18.                 try
  19.                 {
  20.                     // base cost
  21.                     // try
  22.                     {
  23.                         doTry();
  24.                         goto failed;
  25.                     }
  26.                 // catch
  27.                 failed:
  28.                     {
  29.                         doCleanup();
  30.                     }
  31.                 }
  32.                 catch { }
  33.             }
  34.  
  35.             stp.Stop();
  36.             Console.WriteLine("Method call+goto: {0}", stp.Elapsed);
  37.             stp.Reset();
  38.             stp.Start();
  39.  
  40.             for (var i = 0; i < 10000; i++)
  41.             {
  42.                 try
  43.                 {
  44.                     // catch
  45.                     try
  46.                     {
  47.                         doTryFail();
  48.                     }
  49.                     catch
  50.                     {
  51.                         doCleanup();
  52.                     }
  53.                 }
  54.                 catch { }
  55.             }
  56.  
  57.             stp.Stop();
  58.             Console.WriteLine("Try/Catch: {0}", stp.Elapsed);
  59.             stp.Reset();
  60.             stp.Start();
  61.  
  62.             for (var i = 0; i < 10000; i++)
  63.             {
  64.                 try
  65.                 {
  66.                     bool suceeded = false;
  67.                     // finally
  68.                     try
  69.                     {
  70.                         doTryFail();
  71.                         suceeded = true;
  72.                     }
  73.                     finally
  74.                     {
  75.                         if (!suceeded)
  76.                             doCleanup();
  77.                     }
  78.                 }
  79.                 catch { }
  80.             }
  81.  
  82.             stp.Stop();
  83.             Console.WriteLine("Try/Flag/Finally: {0}", stp.Elapsed);
  84.             stp.Reset();
  85.             stp.Start();
  86.             Console.ReadLine();
  87.         }
  88.  
  89. 		// the purpose of checking datetime is just to ensure the call does 
  90. 		// not get optimized out.  Otherwise, it does not matter.
  91.         private static void doTryFail()
  92.         {
  93.             if (System.DateTime.Now.Year == 0)
  94.                 Console.WriteLine("foobar");
  95.             throw new NotImplementedException();
  96.         }
  97.  
  98.         private static void doCleanup()
  99.         {
  100.             if (System.DateTime.Now.Year == 0)
  101.                 Console.WriteLine("foobar");
  102.         }
  103.  
  104.         private static void doTry()
  105.         {
  106.             if (System.DateTime.Now.Year == 0)
  107.                 Console.WriteLine("foobar");
  108.         }
  109.     }
  110. }
  111.  
Success #stdin #stdout 0.14s 35048KB
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Standard input is empty
stdout
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Method call+goto: 00:00:00.0173153
Try/Catch: 00:00:00.0427985
Try/Flag/Finally: 00:00:00.0423863
https://ideone.com/4E6BNa
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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