The Lucene PMC is pleased to announce the release of Apache Lucene 9.9.0. Apache Lucene is a high-performance, full-featured search engine library written entirely in Java. It is a technology suitable for nearly any application that requires structured search, full-text search, faceting, nearest-neighbor search across high-dimensionality vectors, spell correction or query suggestions.
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 9.9.0 Release Highlights: New Features • Add int8 scalar quantization to the HNSW vector format. This optionally allows for more compact lossy storage for the vectors, requiring approximately 4x less memory for fast HNSW search. • HNSW graph now can be merged with multiple threads, leveraging the same infrastructure that inter-segment concurrency utilizes. Improvements • Speed up Panama vector support, use FMA, and test improvements. • FSTCompiler can now approximately limit how much RAM it uses to share suffixes during FST construction using the suffixRAMLimitMB method. Optimizations • Faster top-level conjunctions on term queries when sorting by descending score. • Change Postings back to using FOR in Lucene99PostingsFormat. Freqs, positions and offset keep using PFOR. ... plus a multitude of helpful bug fixes! Please read CHANGES.txt for a full list of new features and changes: https://lucene.apache.org/core/9_9_0/changes/Changes.html -Chris. --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
