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From "Jim Gomes (JIRA)" <>
Subject [jira] Resolved: (AMQNET-109) NMS does not use TcpNoDelay which results in poor performance compared to Java
Date Tue, 02 Sep 2008 21:07:52 GMT


Jim Gomes resolved AMQNET-109.

    Resolution: Fixed

> NMS does not use TcpNoDelay which results in poor performance compared to Java
> ------------------------------------------------------------------------------
>                 Key: AMQNET-109
>                 URL:
>             Project: ActiveMQ .Net
>          Issue Type: Improvement
>          Components: ActiveMQ Client
>    Affects Versions: 1.0
>         Environment: ActiveMQ 5.1 with NMS trunk revison 688066
>            Reporter: Stefan Gmeiner
>            Assignee: Jim Gomes
>             Fix For: 1.0
>         Attachments: NMS-TcpNoDelayEnabled.patch, nmsspeedtest.cs
>          Time Spent: 6 hours
>  Remaining Estimate: 2 hours
> 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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