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  1. using System;
  2. using System.Diagnostics;
  3.  
  4. namespace RiderTestApp
  5. {
  6.     internal class Program
  7.     {
  8.         public static double Round(double d)
  9.         {
  10.             return Math.Round(d);
  11.         }
  12.  
  13.         public static double RoundWithPrecision(double d)
  14.         {
  15.             return Math.Round(d, 0);
  16.         }
  17.  
  18.         public static double Floor(double d)
  19.         {
  20.             return Math.Floor(d + 0.5);
  21.         }
  22.  
  23.         private static void TestRound(int n)
  24.         {
  25.             var s = new Stopwatch();
  26.  
  27.             double d = 0;
  28.  
  29.             s.Start();
  30.  
  31.             for (var i = 0; i < n; i++)
  32.             {
  33.                 d += Round(3.5);
  34.             }
  35.  
  36.             s.Stop();
  37.  
  38.             Console.WriteLine("Round - d: " + d + ", Time: " + s.ElapsedMilliseconds);
  39.         }
  40.  
  41.         private static void TestRoundWithPrecision(int n)
  42.         {
  43.             var s = new Stopwatch();
  44.  
  45.             double d = 0;
  46.  
  47.             s.Start();
  48.  
  49.             for (var i = 0; i < n; i++)
  50.             {
  51.                 d += RoundWithPrecision(3.5);
  52.             }
  53.  
  54.             s.Stop();
  55.  
  56.             Console.WriteLine("RoundWithPrecision - d: " + d + ", Time: " + s.ElapsedMilliseconds);
  57.         }
  58.  
  59.         private static void TestFloor(int n)
  60.         {
  61.             var s = new Stopwatch();
  62.  
  63.             double d = 0;
  64.  
  65.             s.Start();
  66.  
  67.             for (var i = 0; i < n; i++)
  68.             {
  69.                 d += Floor(3.5);
  70.             }
  71.  
  72.             s.Stop();
  73.  
  74.             Console.WriteLine("Floor - d: " + d + ", Time: " + s.ElapsedMilliseconds);
  75.         }
  76.  
  77.         public static void Main()
  78.         {
  79.             Console.WriteLine(Environment.OSVersion);
  80.             Console.WriteLine(Type.GetType("Mono.Runtime") == null ? "MS" : "Mono");
  81.             Console.WriteLine(Environment.Version);
  82.  
  83. #if DEBUG
  84.             Console.WriteLine("Mode=Debug");
  85. #else
  86.             Console.WriteLine("Mode=Release");
  87. #endif
  88.  
  89.             Console.WriteLine();
  90.  
  91.             const int n1 = 1000000;
  92.  
  93.             TestRound(n1);
  94.             TestRoundWithPrecision(n1);
  95.             TestFloor(n1);
  96.  
  97.             Console.WriteLine();
  98.  
  99.             const int n2 = n1 * 10;
  100.  
  101.             TestRound(n2);
  102.             TestRoundWithPrecision(n2);
  103.             TestFloor(n2);
  104.  
  105.             Console.WriteLine();
  106.  
  107.             const int n3 = n2 * 10;
  108.  
  109.             TestRound(n3);
  110.             TestRoundWithPrecision(n3);
  111.             TestFloor(n3);
  112.         }
  113.     }
  114. }
  115.  
Success #stdin #stdout 1.85s 29808KB
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stdin
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Standard input is empty
stdout
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Unix 3.16.0.4
Mono
4.0.30319.17020
Mode=Release

Round - d: 4000000, Time: 3
RoundWithPrecision - d: 4000000, Time: 5
Floor - d: 4000000, Time: 7

Round - d: 40000000, Time: 34
RoundWithPrecision - d: 40000000, Time: 56
Floor - d: 40000000, Time: 75

Round - d: 400000000, Time: 350
RoundWithPrecision - d: 400000000, Time: 567
Floor - d: 400000000, Time: 740
https://ideone.com/KTbHGi
language:
C# (gmcs 5.20.1)
created:
7 years ago
visibility:
public

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