[
https://issues.apache.org/jira/browse/LUCENE-7103?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Robert Muir updated LUCENE-7103:
--------------------------------
Attachment: LUCENE-7103.patch
simple patch. We "do the rest" of the haversin calculation only when we need
the final value: value() and compareTop().
> further optimize LatLonPoint.newDistanceSort
> --------------------------------------------
>
> Key: LUCENE-7103
> URL: https://issues.apache.org/jira/browse/LUCENE-7103
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Robert Muir
> Attachments: LUCENE-7103.patch
>
>
> This comparator creates bounding boxes to avoid calling haversin(), so its no
> longer a hotspot for most use cases.
> But in the worst case, it could still get called many times. This could be
> because the user had a massive top N value, or because the incoming data is
> sorted or mostly sorted by decreasing distance, etc.
> We can optimize the worst case by not invoking a full haversin, just using
> something that is rank-equivalent.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
