[jboss-jira] [JBoss JIRA] Commented: (JBCACHE-1082) Optimise nodes for single elements

[Manik Surtani (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBCACHE-1082?page=comments#action_12416117 ] 
            
Manik Surtani commented on JBCACHE-1082:
----------------------------------------

Some comments by genman:

"It'd be nice if there was a canonical key object though. Something that could be optimally serialized and deserialized as a single byte using the existing CacheMarshaller. Maybe like have something like:

Code:

public interface Node {

   private enum Key { KEY; }

   /** For nodes that store a single value, use this as the key */ 
   Object key = KEY;

   ... node methods here
}

"enum" is good for creating singleton instances."

> Optimise nodes for single elements
> ----------------------------------
>
>                 Key: JBCACHE-1082
>                 URL: http://jira.jboss.com/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
>         Assigned To: Mircea Markus
>             Fix For: 3.0.0
>
>         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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