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https://issues.apache.org/jira/browse/OAK-3154?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Richard resolved OAK-3154.
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Resolution: Won't Fix
> Improve SimpleNodeAggregator performance with a NodeState cache
> ---------------------------------------------------------------
>
> Key: OAK-3154
> URL: https://issues.apache.org/jira/browse/OAK-3154
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: query
> Affects Versions: 1.3.3
> Reporter: Joel Richard
> Labels: performance
>
> I have profiled a query where 16% of the query fetching time is spent inside
> of SimpleNodeAggregator.isNodeType. In my case, a lot of nodes which are read
> have overlapping paths.
> Because the nodes seem to be iterated alphabetically, it would be possible to
> cache the previous NodeState chain in an array and reuse as much as possible
> if the previous and current path overlap. This would significantly reduce the
> query fetching time in cases where a lot of paths are similar. Since the
> NodeState cache array can be reused for the whole query execution, the
> possible overhead of it should be negligible.
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