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https://issues.apache.org/jira/browse/LUCENE-7309?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand updated LUCENE-7309:
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Attachment: LUCENE-7309.patch
Here is a patch. IndexAndSearchOpenStreetMaps reports that the QPS goes from
2.58 (master) to 3.75 (patch) with the Cleveland polygon. Polygon2D
construction alone went from ~260ms to ~160ms.
> Speed up Polygon2D construction
> -------------------------------
>
> Key: LUCENE-7309
> URL: https://issues.apache.org/jira/browse/LUCENE-7309
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-7309.patch
>
>
> Polygon2D.create recursively sorts on each dimension to build a tree.
> However, it does not really need to sort the data, it just needs to compute
> the median and partition other values around it, which can be performed in
> O(n). If I am not mistaken, this would make Polygon2D.create run in O(n
> log(n)) rather than O(n log^2(n)) today.
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