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https://issues.apache.org/jira/browse/DBCP-239?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Takayuki Kaneko updated DBCP-239:
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Affects Version/s: 1.2.2
> Performance bottleneck on Abandoned Object Pool
> -----------------------------------------------
>
> Key: DBCP-239
> URL: https://issues.apache.org/jira/browse/DBCP-239
> Project: Commons Dbcp
> Issue Type: Improvement
> Affects Versions: 1.2.2, 1.3
> Reporter: Takayuki Kaneko
> Attachments: patch.txt
>
>
> AbandonedObjectPool uses ArrayList as trace variable to manage connections.
> I found a bottleneck on it.
> returnObject(Object) has a synchronized block and it will be a bottleneck if
> it manages a lot of connections.
> ArrayList#remove(Object) has to do arraycopy each time. It is tuned by native
> code, but it is still slower than LinkedList#remove(Object).
> IMO, the list doesn't access by index, so LinkedList is better than ArrayList.
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