返回一个字符串数组VS Out参数. | 返回一个字符串数组VS

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问题描述

我想从我的函数中返回多个字符串，所以这在性能问题上会更好，即返回字符串数组或输出参数?

在此先谢谢您.

I want to return multiple strings from my function so which is better regarding performance issue, i.e. Returning an array of string OR Out a parameter?

Thanks in advance.

推荐答案

     string[] ar = File.ReadAllLines(@"F:\Temp\JustSomeText.txt");
     Stopwatch sOut = new Stopwatch();
     sOut.Start();
     for (int i = 0; i < 1000; i++)
         {
         stringsOut(out ar);
         }
     sOut.Stop();
     Stopwatch sRet = new Stopwatch();
     sRet.Start();
     for (int i = 0; i < 1000; i++)
         {
         ar = stringsRet();
         }
     sRet.Stop();
     Console.WriteLine("Out: {0}\nRet: {1}", sOut.ElapsedMilliseconds, sRet.ElapsedMilliseconds);

private void stringsOut(out string[] par)
     {
     par = File.ReadAllLines(@"F:\Temp\JustSomeText.txt");
     }
 private string[] stringsRet()
     {
     return File.ReadAllLines(@"F:\Temp\JustSomeText.txt");
     }

运行3次会得到结果:

Out: 296
Ret: 269
Out: 265
Ret: 270
Out: 273
Ret: 279

那么在实践中呢?没关系！:笑:

[edit]:Doh:我忘记了两个例程-OriginalGriff [/edit]

So in practice? No difference!: laugh:

[edit]:Doh: I forgot the two routines - OriginalGriff[/edit]

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