C# 三種位元組陣列(byte[])拼接的效能對比測試
阿新 • • 發佈:2019-02-04
之前做的通訊框架,一直用的List<byte>做的資料接收池。今天有點閒暇時間,特地寫了個DEMO將C#中的三種位元組陣列拼接方式的效能做了一個對比測試。
程式碼如下(若程式碼有不嚴謹或錯誤之處,懇請指出。):
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Diagnostics; namespace BytesLinkDemo { class Program { static int RunCount = 10000; static void Main(string[] args) { ArrayCopyTest(); BlockCopyTest(); ListTest(); Console.ReadKey(); } static void ListTest() { List<byte> byteSource = new List<byte>(); byteSource.Add(11); Stopwatch sw = new Stopwatch(); sw.Start(); for (int i = 0; i < RunCount; i++) { byte[] newData = new byte[10] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; byteSource.AddRange(newData); } byte[] data = byteSource.ToArray(); //byte[] subData = byteSource.Take(100).ToArray();//獲取前100個位元組 //byteSource.RemoveRange(0, 100);//取出後刪除 //byteSource.GetRange(100, 100);//從下標100開始取100個位元組 sw.Stop(); Console.WriteLine("ListTest " + sw.ElapsedMilliseconds + " 毫秒,陣列長度:" + data.Length); } static void ArrayCopyTest() { byte[] byteSource = new byte[1] { 11 }; Stopwatch sw = new Stopwatch(); sw.Start(); for (int i = 0; i < RunCount; i++) { byte[] newData = new byte[10] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; byte[] tmp = new byte[byteSource.Length + newData.Length]; Array.Copy(byteSource, tmp, byteSource.Length); Array.Copy(newData, 0, tmp, byteSource.Length, newData.Length); byteSource = tmp; } sw.Stop(); Console.WriteLine("ArrayCopyTest " + sw.ElapsedMilliseconds + " 毫秒,陣列長度:" + byteSource.Length); } static void BlockCopyTest() { byte[] byteSource = new byte[1] { 11 }; Stopwatch sw = new Stopwatch(); sw.Start(); for (int i = 0; i < RunCount; i++) { byte[] newData = new byte[10] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; byte[] tmp = new byte[byteSource.Length + newData.Length]; System.Buffer.BlockCopy(byteSource, 0, tmp, 0, byteSource.Length); System.Buffer.BlockCopy(newData, 0, tmp, byteSource.Length, newData.Length); byteSource = tmp; } sw.Stop(); Console.WriteLine("BlockCopyTest " + sw.ElapsedMilliseconds + " 毫秒,陣列長度:" + byteSource.Length); } } }
測試結果: