2016-07-14 66 views
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我使用Socket类将字节数组中的图像数据发送到在同一台PC上运行的第三方程序(所以我不必担心连接问题)。由于我的应用非常简单,因此我只使用同步send(bytes)函数,仅此而已。问题是,它运行速度很慢。如果我发送一张20kB的小图片,它需要接近15ms,但是如果图片足够大--1.5mB,则需要接近800ms,这对我来说是不可接受的。我该如何提高插座性能?C#Socket.send非常慢

Socket sender = new Socket(AddressFamily.InterNetwork,SocketType.Stream, ProtocolType.Tcp); 
IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName()); 
IPAddress ipAddress = ipHostInfo.AddressList[0]; 
IPEndPoint remoteEP = new IPEndPoint(ipAddress, 3998); 
sender.Connect(remoteEP); 

byte[] imgBytes; 
MemoryStream ms = new MemoryStream(); 
Image img = Image.FromFile("С:\img.bmp"); 
img.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp); 
imgBytes = ms.ToArray(); 
/*Some byte operations there: adding headers, file description and other stuff. 
They are really fast and add just 10-30 bytes to array, so I don't post them*/ 

DateTime baseDate = DateTime.Now; // Countdown start 

for (uint i = 0; i < 100; i++) sender.Send(byteMsg); 

TimeSpan diff = DateTime.Now - baseDate; 
Debug.Print("End: " + diff.TotalMilliseconds); 
// 77561 for 1.42mB image, 20209 for 365kb, 1036 for 22kB. 
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你可以显示你发送图像的方式吗? – mxmissile

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更新了我的文章。 – JustLogin

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你是基准吗?那就是,只有'sender.Send'? – Martijn

回答

1

问题是在另一边。我使用CCV socket modification作为服务器,看起来,该程序即使在接收图片时也会执行大量操作。我用测试服务器应用程序(来自Microsoft的Synchronous Server Socket Example,并从中删除了字符串分析)尝试了我的代码,因为这一切都开始工作快近100倍。

1

这可以读取一个大文件到存储器流,将其复制到一个数组,然后重新分配该阵列与一些数据,这实际上会影响性能预先考虑它,而不是Socket.send()。

尝试使用流流拷贝方法:

 Socket sender = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); 
     IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName()); 
     IPAddress ipAddress = ipHostInfo.AddressList[0]; 
     IPEndPoint remoteEP = new IPEndPoint(ipAddress, 3998); 
     sender.Connect(remoteEP); 
     using (var networkStream = new NetworkStream(sender)) 
     { 
      // Some byte operations there: adding headers, file description and other stuff. 
      // These should sent here by virtue of writing bytes (array) to the networkStream 

      // Then send your file 
      using (var fileStream = File.Open(@"С:\img.bmp", FileMode.Open)) 
      { 
       // .NET 4.0+ 
       fileStream.CopyTo(networkStream); 

       // older .NET versions 
       /* 
       byte[] buffer = new byte[4096]; 
       int read; 
       while ((read = fileStream.Read(buffer, 0, buffer.Length)) > 0) 
        networkStream.Write(buffer, 0, read); 
       */ 
      } 
     } 
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谢谢你的回答,但它确实是'Socket.send()'杀死了性能。我已更新我的帖子,以使其明显。 – JustLogin