[jbosscache-issues] [JBoss JIRA] Commented: (JBCACHE-1082) Optimise nodes for single elements
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https://jira.jboss.org/jira/browse/JBCACHE-1082?page=com.atlassian.jira.p...
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Manik Surtani commented on JBCACHE-1082:
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Ok, the SingletonMap approach has made things much quicker for writers, due to faster
copy-on-write (needed by MVCC) when compared to using a real Map for data. And the memory
overhead is much better too.
Optimise nodes for single elements
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Key: JBCACHE-1082
URL: https://jira.jboss.org/jira/browse/JBCACHE-1082
Project: JBoss Cache
Issue Type: Feature Request
Security Level: Public(Everyone can see)
Affects Versions: 2.0.0.CR1
Reporter: Manik Surtani
Assignee: Manik Surtani
Fix For: 3.0.0.GA
Attachments: ReplicatedPojoPerfTest.java, UnversionedNode.patch.txt
Many use cases just place a single object in a Node. Rather than going through the
memory and performance penalties of using Maps for a single entry, we should:
1) Create a reference to 2 Objects for key and value, as well as a Map.
2) Only initialise/construct the Map if Node.putAll() is called, or when Node.put() is
called with a second key/value pair
3) Otherwise just hold the key/value pair as direct object refs.
Would affect UnversionedNode and WorkspaceNodeImpl.
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