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From "Keith Wall (Reopened) (JIRA)" <j...@apache.org>
Subject [jira] [Reopened] (QPID-3714) [Java] Performance Improvements
Date Fri, 17 Feb 2012 14:17:59 GMT

     [ https://issues.apache.org/jira/browse/QPID-3714?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Keith Wall reopened QPID-3714:
------------------------------

      Assignee: Robbie Gemmell  (was: Rob Godfrey)
    
> [Java] Performance Improvements
> -------------------------------
>
>                 Key: QPID-3714
>                 URL: https://issues.apache.org/jira/browse/QPID-3714
>             Project: Qpid
>          Issue Type: Improvement
>          Components: Java Broker, Java Broker BDB Store, Java Broker Derby Store, Java
Client, Java Common
>            Reporter: Rob Godfrey
>            Assignee: Robbie Gemmell
>             Fix For: 0.15
>
>
> Assorted performance improvements for the Java Broker and Client based on profiling and
a bit of common sense:
> Persistence:
> Store message in same transaction as enqueue if possible
> Memory:
> Remove unnecessary (un)boxing
> Reduce unnecessary copying of message data
> Cache short strings
> Cache queues for a given routing key on an Exchange
> (0-9) Use a fixed size buffer for preparing frames to write out
> Other:
> Reduce calls to System.currentTimeMillis
> Cache publishing access control queries
> (0-10) Special case immutable RangeSets, in particular RangeSets of a single range/point
> (0-10) Special case delivery properties and message properties in headers
> (0-9) send commit-ok as soon as data committed to store
> (0-9) Optimised long and int typed values for FieldTables
> (0-9) Retain FieldTable encoded form
> (0-9) Cache queue and topic destinations

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