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https://issues.apache.org/jira/browse/LUCENE-1732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12726997#action_12726997
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Uwe Schindler commented on LUCENE-1732:
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This is only a couple of days until this is part of Solr trunk. This is a case
about Lucene 2.9, so it should use Lucene 2.9 things. This contrib may be part
of Solr some time in the future but until then the Lucene JARs will also be
updated.
I only mention this, as I will do the change to NumericUtils in very near
future (when I have time to do it). NumericUtils has also the important
advantage, that it is natively supported by Lucene's FieldCache (you can do
e.g. FieldCache.getFloats() on such a field), so calculations on such fields
could also be done using the FieldCache.
The Lucene people have no problem with changing the API nor the index format,
as this was not yet released, so there is no backwards problem (only for people
already using another version of LocalLucene).
Uwe
> Multi-threaded Spatial Search
> -----------------------------
>
> Key: LUCENE-1732
> URL: https://issues.apache.org/jira/browse/LUCENE-1732
> Project: Lucene - Java
> Issue Type: Improvement
> Components: contrib/spatial
> Affects Versions: 2.9
> Reporter: Chris Male
> Attachments: LUCENE-1732_multi_threaded_spatial_search.patch
>
>
> The attached patch is a large refactoring of the spatial search contrib. The
> primary contribution is the creation of the ThreadedDistanceFilter, which
> uses an ExecutorService to filter the documents in multiple threads. As a
> result of doing the filtering in multiple threads, the time taken to filter
> 1.2 million documents has been reduced from nearly 3s, to between 500-800ms.
> As part of this work, the DistanceQueryBuilder has been replaced by the
> SpatialFilter, a Lucene Filter, some unused functionality has been removed,
> and the package hierarchy has changed. Consequently this patch breaks
> backwards compatibility with the existing spatial search contrib.
> Also during the process of making these changes, abstractions have been added
> so that the one implementation of the ThreadedDistanceFilter can work with
> lat/long and geohash data formats, and so that precise but costly arc
> distance calculations can be replaced by less precise but much more efficient
> flat plane calculations if needed.
> This patch will be used in an upcoming patch for Solr which will improve
> Solr's support for spatial search.
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