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https://issues.apache.org/jira/browse/LUCENE-6118?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand updated LUCENE-6118:
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Attachment: LUCENE-6118.patch
Here is a patch. No more java.lang.Integers and 22 bytes per entry on average
(4 for the ring buffer and 18 for the bag that tracks frequencies).
> Improve efficiency of the history structure for filter caching
> --------------------------------------------------------------
>
> Key: LUCENE-6118
> URL: https://issues.apache.org/jira/browse/LUCENE-6118
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-6118.patch
>
>
> The filter caching uses a ring buffer that tracks frequencies of the
> hashcodes of the most-recently used filters. However it is based on an
> ArrayDeque<Integer> and a HashMap<Integer> which keep on (un)wrapping ints.
> Since the data-structure is very simple, we could try to do something
> better...
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