High-Performance PRISM Index for PostgreSQL: Faster Than pgvector's IVFFlat and HNSW

The pg_vectorsearch extension introduces the PRISM index, a PostgreSQL-native vector search method that outperforms pgvector's IVFFlat and HNSW through advanced quantization, routing, and SIMD-optimized distance computation. It supports existing pgvector tables and offers faster query and index building performance with error-bound filtering.

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