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unum-cloud/USearch

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Fast Open-Source Search & Clustering engine × for Vectors & Arbitrary Objects × in C++, C, Python, JavaScript, Rust, Java, Objective-C, Swift, C#, GoLang, and Wolfram 🔍

37 mentions on Hacker News by 22 people: 7 stories, 30 comments · first 2023-05-03 · latest 2026-03-07

Mentions per year 37 mentions · busiest year 2024 (14)
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  1. …don't include support for vectors on disk, which forces you into using a hell of a lot of RAM. https://github.com/unum-cloud/USearch
    comment by sdenton4 · 2026-03-07 · in Querying 3B Vectors
  2. …a special virtual table layout that constrains the types of the other columns in the table.) See https://github.com/unum-cloud/USearch . pip-installable for Python users.
    comment by stevesimmons · 2026-02-17 · in Hamming Distance for Hybrid Search in SQLite
  3. Did someone compared with uSearch ( https://github.com/unum-cloud/USearch )?
    comment by clemlesne · 2026-02-14 · in Zvec: A lightweight, fast, in-process vector database
  4. Embedded usearch vector database. https://github.com/unum-cloud/USearch
    comment by ehsanu1 · 2026-01-15 · in Ask HN: How are you doing RAG locally?
  5. …anything that mentions fast brute force search. I personally don't need an index. But I see that https://github.com/unum-cloud/usearch which is used by duckdb-vss in turn uses https://github.com/ashvardanian/simsimd which should make a…
    comment by roflcopter69 · 2025-09-13 · in Vector database that can index 1B vectors in 48M
  6. USearch is this type of library: https://github.com/unum-cloud/usearch Used in ClickHouse and a few other DBMS.
    comment by AlexClickHouse · 2025-09-12 · in Vector database that can index 1B vectors in 48M
  7. …C++ kernel), Numba (for Python), or PeachPy (for x86 Asm), interacting with a precompiled engine: https://github.com/unum-cloud/usearch/blob/main/python/READM...
    comment by ashvardanian · 2025-07-16 · in cppyy: Automatic Python-C++ Bindings
  8. …< https://github.com/ashvardanian/stringzilla >, and will be integrated into both USearch < https://github.com/unum-cloud/usearch > and somewhere else ;)
    comment by ashvardanian · 2025-04-18 · in Less Slow C++
  9. I use usearch for the engine https://github.com/unum-cloud/usearch/ . It's fast. The vectors are stored in DB and added to usearch at startup for retreival. There is also FAISS.
    comment by carlbren · 2025-03-22 · in Ask HN: Alternatives to Vector DB?
  10. …Unum’s usearch. It beats anything, and is super easy to use. It just does exactly what you need. https://github.com/unum-cloud/usearch
    comment by stephantul · 2025-02-24 · in The best way to use text embeddings portably is with Parquet and Polars
  11. …12 seconds for usearch on an M2 max with enough ram to hold the vectors without swapping. [1] https://github.com/unum-cloud/usearch?tab=readme-ov-file#exa...
    comment by vegabook · 2024-12-23 · in Why HNSW is not the answer and disk-based alternatives might be more practical
  12. …acceleration (via dynamic dispatch), optional compression. Not affiliated but really cool tech. https://github.com/unum-cloud/usearch
    comment by rockwotj · 2024-12-23 · in Why HNSW is not the answer and disk-based alternatives might be more practical
  13. Try Usearch - it's really fast and under rated https://github.com/unum-cloud/usearch
    comment by ebursztein · 2024-11-02 · in Spann: Highly-Efficient Billion-Scale Approximate Nearest Neighbor Search (2021)
  14. …for a long time, but it's more low-level and you'd have to use something else for embeddings: https://github.com/unum-cloud/usearch/tree/main/golang
    comment by ashvardanian · 2024-10-30 · in Go library for in-process vector search and embeddings with llama.cpp
  15. Might have a look at this library: https://github.com/unum-cloud/usearch It does HNSW and there is a SQLite related project, though not quite the same thing.
    comment by sroussey · 2024-05-03 · in I’m writing a new vector search SQLite Extension
  16. …HNSW implementations which have solid rust bindings then I’d highly recommend checking out usearch https://github.com/unum-cloud/usearch
    comment by kernelsanderz · 2024-03-14 · in Show HN: A fast HNSW implementation in Rust
  17. From a cursory glance, usearch[1] seems more portable. [1]: https://github.com/unum-cloud/usearch
    comment by vishnumohandas · 2024-01-27 · in Are we at peak vector database?
  18. I've been looking at this one to embed in desktop apps https://github.com/unum-cloud/usearch
    comment by rgbrgb · 2024-01-23 · in Qdrant, the Vector Search Database, raised $28M in a Series A round
  19. …thread is usearch, though not a separate algorithm, based on HNSW with a bunch of optimizations https://github.com/unum-cloud/usearch
    comment by jasonjmcghee · 2024-01-17 · in Ask HN: What is the state of art approximate k-NN search algorithm today?
  20. I've used usearch successfully for a small project: https://github.com/unum-cloud/usearch/
    comment by ehsanu1 · 2024-01-13 · in Vector Databases: A Technical Primer [pdf]
  21. …of new features coming :) [1]: https://www.unum.cloud/blog/2023-11-07-scaling-vector-search... [2]: https://github.com/unum-cloud/usearch/pull/171/files
    comment by ashvardanian · 2024-01-03 · in 90x Faster Than Pgvector – Lantern's HNSW Index Creation Time
  22. …on servers and mobile, and through projects like ClickHouse and some of the Google repos): https://github.com/unum-cloud/usearch/issues/320
    comment by ashvardanian · 2023-12-18 · in Python, C, Assembly – Faster Cosine Similarity
  23. …project! As you scale, you may benefit from these two projects I maintain, and the Big Tech uses :) https://github.com/unum-cloud/usearch - for faster search https://github.com/unum-cloud/uform - for cheaper multi-lingual multi-modal…
    comment by ashvardanian · 2023-12-14 · in Show HN: I scraped 25M Shopify products to build a search engine
  24. …as well. I've looked into a couple more libs, and here is the best I've come up with so far: https://github.com/unum-cloud/usearch/blob/f942b6f334b31716f... > Your substring routines have multiplicative worst case Yes, that is true. It's a…
    comment by ashvardanian · 2023-08-29 · in Stringzilla: Fastest string sort, search, split, and shuffle using SIMD
  25. What about Unum's quantization methods? https://github.com/unum-cloud/usearch
    comment by KRAKRISMOTT · 2023-08-05 · in MK-1
  26. …the knowledge of the intental structure to make it faster if done over the network? Talking about https://github.com/unum-cloud/usearch#disk-based-indexes
    comment by nh2 · 2023-08-01 · in USearch: Smaller and faster single-file vector search engine
  27. …the faster implementations of vector search. You can find the benchmarks in the first table here: https://github.com/unum-cloud/usearch#memory-efficiency-down...
    comment by ashvardanian · 2023-07-31 · in USearch: Smaller and faster single-file vector search engine
  28. …has free time and C++ experience I am open to recommendations on the codebase and style as well: https://github.com/unum-cloud/usearch/blob/main-dev/include/...
    comment by ashvardanian · 2023-07-31 · in USearch: Smaller and faster single-file vector search engine
  29. …harder then. There was no Numba and I had to implement every experiment in C++, without JIT-ing: https://github.com/unum-cloud/usearch/releases/tag/v0.19.0
    comment by ashvardanian · 2023-07-18 · in From Dating to Vector Search – “Stable Marriages” on a Global Scale
  30. …elements of different dimensionality, which allows much broader applicability [2]. [1]: https://github.com/unum-cloud/usearch [2]: https://ashvardanian.com/posts/abusing-vector-search
    comment by ashvardanian · 2023-06-15 · in FANN: Vector Search in 200 Lines of Rust