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pg_vectorsearch vs pgvector HNSW: 42 Hours vs 49 Minutes. Here's the Catch

On a 64 vCPU, 512 GiB machine, pgvector took 42 hours to build an HNSW index over 100 million vectors. On the same box, Timescale's new pg_vectorsearch extension built its index in 49 minutes and answered queries in half the time. Those are the numbers in the launch post from Tiger Data (formerly T…

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  1. 2026-10-16 14:40 · DEV Community — Machine Learning
    pg_vectorsearch vs pgvector HNSW: 42 Hours vs 49 Minutes. Here's the Catch

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