[QPID-3714] [Java] Performance Improvements

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.15
• Component/s: Broker-J, Java Common, JMS AMQP 0-x
• Labels: derbystore
• Assignee: Robbie Gemmell
• Reporter: Robert Godfrey
• Created: 28/Dec/11 12:54
• Updated: 11/Feb/15 20:07
• Resolved: 17/Feb/12 14:25

Description

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