# timescale/pg_vectorsearch

> A PostgreSQL extension providing a PRISM index for high-performance approximate nearest neighbor vector search, with RaBitQ quantization and SIMD distance computation. It is compatible with pgvector columns and targets large-scale vector workloads.

- Magnitude: 5.7 out of 10 — Early signal
- Stars: 167 total · +57 stars measured 2026-10-14, 13:28–15:18 UTC, ≈ 83 by evening
- Star trust: star growth looks organic
- Category: Backend & databases · Language: C · License: PostgreSQL · Created: 2026-01-30 · Last push: 2026-10-13
- GitHub: https://github.com/timescale/pg_vectorsearch · Page: https://gitnova.dev/en/r/timescale/pg_vectorsearch

## Useful for

- Build a PRISM index on an existing pgvector table without rewriting data
- Run ANN queries over 100M+ vectors with tunable recall via prism.nprobe
- Replace an HNSW index with PRISM and verify the planner picks it via EXPLAIN

## Why it’s here

- Star-counter measurements on 2026-10-14 (UTC), 13:28–15:18: 110 → 167 stars (+57). This is the change over that interval.
- Estimated end-of-day forecast: about +83 stars, using observed gains and the previous day.
- Before this, the repository barely got any stars — about 0 per day.
- Hacker News: “Pg_vectorsearch: An index that is faster than pgvector's IVFFlat and HNSW” — 94 points, 3 h ago.

## Star trust

Star growth looks organic.

Star-trust labels are heuristics based on the repository’s behavior, not a check of every stargazer.

## Numbers

- Forks: 6
- Issues and pull requests: 369
- Watchers: 1
- Average over the last week: 20 per day
- Usual pace: 0 per day
- Stars in the last hour (measured): 32
- Latest release: v0.1.0 (2026-10-13)

## Stars per day, last 30 days (oldest → newest, today is partial)

2026-09-15 … 2026-10-14: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 54, 57

## Hacker News

- Pg_vectorsearch: An index that is faster than pgvector's IVFFlat and HNSW — 94 points, 33 comments: https://news.ycombinator.com/item?id=50086165

## Spotted in now

- Spotted on Hacker News

## Similar by description

1. **RyanCodrai/turbovec** — 1.1 · Steady · Language models · Rust · +1 star measured 2026-10-14, 00:03–15:41 UTC, ≈ 2 by evening
   A Rust vector index with Python bindings built on the TurboQuant algorithm for compressed embeddings and fast nearest-neighbor search without training.
   Full card: https://gitnova.dev/en/r/RyanCodrai/turbovec.md

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Magnitude (0–10) measures how fast and how unusually interest in a repository is growing right now. It is not a quality score.
Days are UTC. “So far today” is a fact; “expected by the end of the day” is a forecast.
Summaries and use cases are written by an LLM (DeepSeek V4.1 Flash) from the README and may be inaccurate: verify specific claims (benchmarks, speed, hardware) in the repository itself.
Data as of 2026-10-14 15:42 UTC, updated every 30 minutes.