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  1. using System;
  2. using System.IO;
  3. using System.Collections.Generic;
  4. using System.Diagnostics;
  5. using System.Linq;
  6. using System.Text;
  7.  
  8. public class Program {
  9.     static int[] array = new int[] { 1, 3 };
  10.  
  11.     static long benchMathMax(int time) {
  12.         var stopWatch = new Stopwatch();
  13.         stopWatch.Start();
  14.         for (int i = 0; i < time; i++) {
  15.             var r = Math.Max(array[0], array[1]);
  16.         }
  17.         return stopWatch.ElapsedMilliseconds;
  18.     }
  19.  
  20.     static long benchEnumerableMax(int time) {
  21.         var stopWatch = new Stopwatch();
  22.         stopWatch.Start();
  23.         for (int i = 0; i < time; i++) {
  24.             var r = array.Max();
  25.         }
  26.         return stopWatch.ElapsedMilliseconds;
  27.     }
  28.  
  29.     static long benchArrayLength(int time) {
  30.         var stopWatch = new Stopwatch();
  31.         stopWatch.Start();
  32.         for (int i = 0; i < time; i++) {
  33.             var r = array.Length;
  34.         }
  35.         return stopWatch.ElapsedMilliseconds;
  36.     }
  37.  
  38.     static long benchEnumerableCount(int time) {
  39.         var stopWatch = new Stopwatch();
  40.         stopWatch.Start();
  41.         for (int i = 0; i < time; i++) {
  42.             var r = array.Count();
  43.         }
  44.         return stopWatch.ElapsedMilliseconds;
  45.     }
  46.  
  47.     static void Main(string[] args) {
  48.         var array = new[] { 1, 3 };
  49.  
  50.         int time = 10000000; 
  51.  
  52.         Console.WriteLine("Math.Max        : {0}ms", benchMathMax(time));
  53.         Console.WriteLine("Enumerable.Max  : {0}ms", benchEnumerableMax(time));
  54.         Console.WriteLine("Array.Length    : {0}ms", benchArrayLength(time));
  55.         Console.WriteLine("Enumerable.Count: {0}ms", benchEnumerableCount(time));
  56.     }
  57. }
  58.  
Success #stdin #stdout 1.63s 34208KB
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stdin
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Standard input is empty
stdout
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Math.Max        : 24ms
Enumerable.Max  : 1363ms
Array.Length    : 8ms
Enumerable.Count: 218ms
https://ideone.com/839gvs
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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