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  1. using System;
  2. using System.Linq;
  3. using System.Collections.Generic;
  4.  
  5. public class Test
  6. {
  7. 	public static void Main()
  8. 	{
  9.             var numbers = new List<int>(); 
  10.             numbers.Add(1);
  11.             for (int i = 1; i <= 3000000; i++)
  12.             {
  13.                 numbers.Add(i);
  14.             }
  15. 	    var sw = new System.Diagnostics.Stopwatch();
  16.             var memBefore = GC.GetTotalMemory(true);
  17.             sw.Start();
  18.             var set = new HashSet<int>(numbers);
  19.             bool allUnique = numbers.Count == set.Count;
  20.             sw.Stop();
  21.             String constructorMeasurement = string.Format(
  22.                 "Set constructor memory consumption: {0} MB, duration: {1}"
  23.                 , (GC.GetTotalMemory(true) - memBefore) / (1024 * 1024)
  24.                 , sw.Elapsed);
  25.  
  26.             set = new HashSet<int>();
  27.             memBefore = GC.GetTotalMemory(true);
  28.             sw = new System.Diagnostics.Stopwatch();
  29.             sw.Start();
  30.             allUnique = numbers.All(n => set.Add(n));
  31.             sw.Stop();
  32.             String enumerableAllMeasurement = string.Format(
  33.                 "Enumerable.All memory consumption: {0} MB, duration: {1}"
  34.                 , (GC.GetTotalMemory(true) - memBefore) / (1024 * 1024)
  35.                 , sw.Elapsed);
  36.  
  37. 	    Console.WriteLine( constructorMeasurement );
  38. 	    Console.WriteLine( enumerableAllMeasurement);
  39. 	}
  40. }
Success #stdin #stdout 0.4s 145536KB
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Standard input is empty
stdout
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Set constructor memory consumption: 50 MB, duration: 00:00:00.2962615
Enumerable.All memory consumption: 0 MB, duration: 00:00:00.0004254
https://ideone.com/G48CYv
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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