Page History

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• The new IndexWriter#updateDocuments(Query, Iterable) allows updating multiple documents that match a query at the same time.
• Function queries can now compute similarity scores between kNN vectors.

Optimizations

• KNN indexing and querying can now take advantage of vectorization for distance computation between vectors. To enable this, use exactly Java 20 or 21, and pass --add-modules jdk.incubator.vector as a command-line parameter to the Java program.

• KNN queries now run concurrently if the IndexSearcher has been created with an executor.

• Queries sorted by field are now able to dynamically prune hits only using the after value. This yields major speedups when paginating deeply.
• Reduced merge-time overhead of computing the number of soft deletes.

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