Question

我已经实现了一个场景，该场景使用netTcpBinding和WsHttpBinding以及传输安全性（https）作为WCF中的通信绑定类型。然后我比较了性能结果。有趣的是，netTcpBinding比wsHttpBinding慢。我已经阅读了很多关于绑定性能的文档，我知道netTcpBinding因为二进制编码而提供最快的通信。

你能解释一下在我的测试中可能导致这种情况的原因吗？感谢。

测试环境：IIS 7

public static WSHttpBinding GetWSHttpForSSLBinding()
{
   WSHttpBinding binding = new WSHttpBinding();
   binding.TransactionFlow = true;
   binding.MaxReceivedMessageSize = 2147483647;
   binding.MessageEncoding = WSMessageEncoding.Text;
   binding.Security.Mode = SecurityMode.Transport;
   binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.None;
   binding.ReaderQuotas.MaxStringContentLength = 2147483647;
   binding.OpenTimeout = TimeSpan.MaxValue;
   binding.CloseTimeout = TimeSpan.MaxValue;
   binding.SendTimeout = TimeSpan.MaxValue;
   binding.ReceiveTimeout = TimeSpan.MaxValue;
   return binding;
}

public static NetTcpBinding GetTcpBinding()
{
   NetTcpBinding binding = new NetTcpBinding();
   binding.TransactionFlow = true;
   binding.MaxReceivedMessageSize = 2147483647;
   binding.PortSharingEnabled = true;
   binding.Security.Mode = SecurityMode.Transport;
   binding.Security.Transport.ClientCredentialType = TcpClientCredentialType.Windows;
   binding.Security.Transport.ProtectionLevel = ProtectionLevel.EncryptAndSign;
   binding.Security.Message.ClientCredentialType = MessageCredentialType.Windows;
   binding.Security.Message.AlgorithmSuite = SecurityAlgorithmSuite.TripleDesSha256;
   binding.ReaderQuotas.MaxStringContentLength = 2147483647;
   binding.ReaderQuotas.MaxArrayLength = 2147483647;
   binding.OpenTimeout = TimeSpan.MaxValue;
   binding.CloseTimeout = TimeSpan.MaxValue;
   binding.SendTimeout = TimeSpan.MaxValue;
   binding.ReceiveTimeout = TimeSpan.MaxValue;
   return binding;
}

Answer 1

您的net.tcp绑定使用身份验证，但http绑定不使用。另外，通过单个代理的多个操作调用以及更大的消息加载来重复测试。由于频道创建和连接建立，第一次呼叫总是很慢。

Answer 2

您是在谈论延迟还是吞吐量？客户端是创建连接然后立即关闭它还是跨越多个调用。

NetTcp在同一连接上进行优化，有效负载大小会更小，因为它对wshttp使用BinaryEncoding和TextEncoding。

如果您正在考虑延迟 - NetTcp会执行Windows身份验证，导致AD查找与使用SSL身份验证的wshttp相比。

netTcpBinding如何比wsHttpBinding慢？

2 个答案: