[
https://issues.apache.org/jira/browse/DERBY-6230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Knut Anders Hatlen resolved DERBY-6230.
---------------------------------------
Resolution: Fixed
Fix Version/s: 10.11.0.0
Issue & fix info: (was: Patch Available)
Committed revision 1487773.
> Use the JVM's cache of Number instances in ReuseFactory
> -------------------------------------------------------
>
> Key: DERBY-6230
> URL: https://issues.apache.org/jira/browse/DERBY-6230
> Project: Derby
> Issue Type: Improvement
> Components: Services
> Affects Versions: 10.11.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Fix For: 10.11.0.0
>
> Attachments: derby-6230-01-a.diff
>
>
> ReuseFactory has a cache of Byte, Short, Integer and Long instances to avoid
> excessive allocation of such instances.
> As of Java 5, the JVM has a cache of its own, available through static
> valueOf() methods in these classes.
> The JVM's cache is guaranteed to have at least all values in the range [-128,
> 127]. ReuseFactory currently caches Integer instances in the range [-1, 18]
> plus a few special values, and Byte, Short and Long instances in the range
> [0, 10].
> If we change ReuseFactory so that it uses the JVM's cache, the number of
> cache misses will be lower, and the code will become shorter.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
