[OPENJPA-2292] Reduce object allocations

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.1, 2.2.1.1, 2.3.0
• Fix Version/s: 2.2.2, 2.2.1.1, 2.3.0
• Component/s: jdbc, performance
• Assignee: Richard G. Curtis
• Reporter: Richard G. Curtis
• Created: 05/Nov/12 19:27
• Updated: 10/Apr/13 14:51
• Resolved: 06/Nov/12 17:20

Description

While doing some performance analysis we have found that we can reduce object allocations a number of places in the code base.

• In JDBCStoreManager we can create a simple pool(list) of CancelPreparedStatement/CancelStatement.
• BrokerImpl.initializeOperatingSet, use a java.util.IdentityHashMap rather than org.apache.commons.collections.map.IdentityMap.IdentityMap.