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From Adrien Grand <jpou...@gmail.com>
Subject [ANNOUNCE] Apache Lucene 8.4.0 released
Date Sun, 29 Dec 2019 19:58:04 GMT
The Lucene PMC is pleased to announce the release of Apache Lucene 8.4.0.

Apache Lucene is a high-performance, full-featured text search engine
library written entirely in Java. It is a technology suitable for nearly
any application that requires full-text search, especially cross-platform.

This release contains numerous bug fixes, optimizations, and improvements,
some of which are highlighted below. The release is available for immediate
download at:

  <https://lucene.apache.org/core/downloads.html>

### Lucene 8.4.0 Release Highlights:

  * LatLonShape now supports the "CONTAINS" relation, which enables to find
all indexed shapes that contain the query shape.
  * Concurrent search is getting more efficient by allowing collectors to
share information across threads in order to more efficiently skip
non-competitive hits.
  * Faster FST lookups on dense nodes.
  * Postings are now decoded using SIMD instructions.
  * LRUQueryCache includes new heuristics that prevent caching from hurting
latency too much.
  * LatLonShape builds a more efficient tree that is expected to translate
into search speed improvements.
  * BaseDirectoryReader no longer sums up document counts across leaves
eagerly, allowing for more efficient reader views that hide a subset of
documents.
  * The index on top of BKD trees is now stored off-heap with MMapDirectory.
  * Simple Intervals Queries supports highlighting.
  * Reading DocValues can be interrupted when timeout is exceeded.

Please read CHANGES.txt for a full list of new features and changes:

  <https://lucene.apache.org/core/8_4_0/changes/Changes.html>


Note: The Apache Software Foundation uses an extensive mirroring network for
distributing releases. It is possible that the mirror you are using may not
have
replicated the release yet. If that is the case, please try another mirror.
This also applies to Maven access.

-- 
Adrien

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