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:


### 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
  * 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:


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