C#數組複製效能測試

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 1 using System; 2 using System.Collections; 3 using System.Collections.Generic; 4 using System.Data; 5 using System.Diagnostics; 6 using System.IO; 7 using System.Linq; 8 using System.Runtime.InteropServices; 9 using System.Threading;10 using EmisData;11 using Newtonsoft.Json;12 13 namespace CLibrary.ConsoleApp14 {15     class Program16     {17         static void Main(string[] args)18         {19             int len = 50000000;20             int[] newArray = new int[len];21             Stopwatch sw = new Stopwatch();22             int[] allArray = new int[len];23             for (int i = 0; i < len; i++)24             {25                 allArray[i] = i;26             }27 28             sw.Start();29             Thread.Sleep(1000);30             Array.Copy(allArray, newArray, len);31             sw.Stop();32             Console.WriteLine("Array.Copy 執行時間（毫秒）"+ sw.ElapsedMilliseconds);33 34             Array.Clear(newArray, 0, len);35             sw.Restart();36             Thread.Sleep(1000);37             newArray = (int[])allArray.Clone();38             sw.Stop();39             Console.WriteLine("Array.Clone 執行時間（毫秒）" + sw.ElapsedMilliseconds);40 41             Array.Clear(newArray, 0, len);42             sw.Restart();43             Thread.Sleep(1000);44             Buffer.BlockCopy(allArray, 0, newArray, 0, len);45             sw.Stop();46             Console.WriteLine("Buffer.BlockCopy 執行時間（毫秒）" + sw.ElapsedMilliseconds);47 48             Console.ReadKey();49         }50 51        52 53     }54 55 }

測試結果：

 可見：Buffer.BlockCopy 表現最佳

C#數組複製效能測試