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https://issues.apache.org/jira/browse/LUCENE-7239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15254237#comment-15254237
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Robert Muir commented on LUCENE-7239:
-------------------------------------
Just as a followup: the still-sluggish performance of the synthetic polys in
the benchmarks here versus the "real" ones is mostly due to the actual
luceneutil poly generation code in the benchmark itself: this is very slow. I
will try to fix it so we can have a better understanding of when/where/how
things degrade.
> Speed up LatLonPoint's polygon queries when there are many vertices
> -------------------------------------------------------------------
>
> Key: LUCENE-7239
> URL: https://issues.apache.org/jira/browse/LUCENE-7239
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Robert Muir
> Fix For: master, 6.1
>
> Attachments: LUCENE-7239.patch, LUCENE-7239.patch
>
>
> This is inspired by the "reliability and numerical stability" recommendations
> at the end of http://www-ma2.upc.es/geoc/Schirra-pointPolygon.pdf.
> Basically our polys need to answer two questions that are slow today:
> contains(point)
> crosses(rectangle)
> Both of these ops only care about a subset of edges: the ones overlapping a y
> interval range. We can organize these edges in an interval tree to be
> practical and speed things up a lot. Worst case is still O(n) but those
> solutions are more complex to do.
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