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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. using System.Threading.Tasks;
  7.  
  8. namespace ConsoleApplication5
  9. {
  10.     class Program
  11.     {
  12.         static void Main(string[] args)
  13.         {
  14.             var stopWatch = new Stopwatch();
  15.             stopWatch.Start();
  16.  
  17.             var list = new List<int>();
  18.  
  19.             foreach (var i in Enumerable.Range(0, 10000))
  20.             {
  21.                 list.Add(i);
  22.             }
  23.  
  24.             stopWatch.Stop();
  25.             Console.WriteLine($"Count:{list.Count}");
  26.             Console.WriteLine($"time:{stopWatch.ElapsedTicks}");
  27.  
  28.             list = new List<int>();
  29.             stopWatch = new Stopwatch();
  30.             stopWatch.Start();
  31.             Parallel.ForEach(Enumerable.Range(0, 10000), new ParallelOptions() { MaxDegreeOfParallelism = 1000 }, i =>
  32.             {
  33.                 lock(list)
  34.                 {
  35.                     list.Add(i);
  36.                 }
  37.             });
  38.  
  39.             stopWatch.Stop();
  40.             Console.WriteLine($"Count:{list.Count}");
  41.             Console.WriteLine($"time:{stopWatch.ElapsedTicks}");
  42.         }
  43.     }
  44. }
Success #stdin #stdout 0.08s 27408KB
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stdin
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Standard input is empty
stdout
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Count:10000
time:34208
Count:10000
time:542652
https://ideone.com/nXTPST
language:
C# (gmcs 5.20.1)
created:
8 years ago
visibility:
secret

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