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From "Stefan Gmeiner (JIRA)" <>
Subject [jira] Created: (AMQNET-109) NMS does not use TcpNoDelay which results in poor performance compared to Java
Date Wed, 27 Aug 2008 14:37:52 GMT
NMS does not use TcpNoDelay which results in poor performance compared to Java

                 Key: AMQNET-109
             Project: ActiveMQ .Net
          Issue Type: Improvement
          Components: ActiveMQ Client
         Environment: ActiveMQ 5.1 with NMS trunk revison 688066
            Reporter: Stefan Gmeiner
            Assignee: James Strachan
         Attachments: NMS-TcpNoDelayEnabled.patch

We are evaluating the NMS-API to connect a C# app to our ActiveMQ broker. For this we wrote
a simple client which sends a request and waits for a reply (Client --> Broker --> Server
--> Broker --> Client). The client/server C#-app runs in a single process with two different
connections to the broker which resides on a  different pc on the network.

This scenario takes about 200ms for each message transfered by the C#-API and less than 20ms
by the Java-API although both do the same thing. 

After looking through the code I found out that the NMS client does not use the TcpNoDelay-Option
during the wire negoation. I changed the code so that this option will be negotiated with
the broker and set on the underlying socket and now I have apperently the same performance
as with Java. I attached the code change as patch to the current trunk version of the .NET-client.

We would be happy if someone could check the patch and give some feedback.

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