A fast HNSW implementation in Rust

In plain words

A Rust-based implementation of the HNSW (Hierarchical Navigable Small World) algorithm for fast similarity search. Built for developers who need efficient vector search capabilities in their applications, it offers high-performance approximate nearest neighbor search optimized for speed. The implementation prioritizes Rust's performance characteristics to deliver faster indexing and query times compared to alternative approaches. Available as open source on GitHub.

written from the facts on this page · September 2026

• 
  HNSW index for vector embeddings in approx 500 LOC2025 · github.com · ▲73

  Heirarchical Navigable Small Worlds. Contribute to dicroce/hnsw development by creating an account on GitHub.

• 
  Tinyhnsw – The Littlest Vector Database2025 · github.com · ▲17

  In an effort to understand it, I put together a simple, pure python implementation of HNSW, an approximate nearest neighbor library. Learned a lot, and I think for anyone interested in vector search it's an exercise that's absolutely worth doing. The code is optimized (imo) for readability, and working (albeit, quite slowly) on putting together a tutorial that walks through the motivation and implementation of HNSW. There's also working code examples for using the library for text and image search with sentence transformers and CLIP!

• 
  Embeddable HNSW Library for Go2024 · github.com · ▲11

  Frustrated by the inability to play with semantic search / ANN in Go w/o a heavy-weight external DB, I created this HNSW library. I hope other gophers find it useful.

• 
  Fast vector similarity using Rust and Python2023 · github.com · ▲141

  I recently found myself computing the similarity between lots of very high dimensional vectors (i.e., sentence embedding vectors from LLMs), and I wanted to try some more powerful measures of similarity/dependency than just Cosine similarity, which seems to be the default for everything nowadays because of its computational efficiency. There are many other more involved measures that can detect more subtle relationships, but the problem is that some of them are quite slow to compute, especially if you're trying to do it in Python. For my favorite measure of statistical dependency,…

• 
  SeekStorm – open-source sub-millisecond search in Rust2024 · github.com · ▲245

  SeekStorm: vector & lexical search - in-process library & multi-tenancy server, in Rust. - SeekStorm/SeekStorm

• 
  Vector – A High-Performance Log and Metric Router Written in Rust2019 · github.com · ▲322

  A high-performance observability data pipeline. Contribute to vectordotdev/vector development by creating an account on GitHub.

• 
  /dev/null▲468

  a social network for devs

  Dev tools · 2d ago · dev-null.sh

• 
  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 27d ago · github.com

• 
  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 25d ago · github.com

• 
  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 22d ago · openbot.run

• 
  Talanoa▲340

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 20d ago · talanoa.email

• 
  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 27d ago · corespeed.io

• 
  Dub.co▲1,475

  Short links with superpowers

  Dev tools · 2024 · dub.co

• 
  3 years and 1M users later, I just open-sourced my "Internet OS"▲1,274

  🌐 The Internet Computer! Free, Open-Source, and Self-Hostable. - HeyPuter/puter

  Dev tools · 2024 · github.com

• 
  Microlaunch▲1,115

  Launch and get feedback on both the idea and product

  Dev tools · 2024 · microlaunch.net

• 
  Milestone▲1,113

  Interactive, gamified product tours for SaaS

  Growth · 2024 · milestoneflow.io

• 
  Hunted Space▲1,004

  Insights on Product Hunt launches

  Growth · 2024 · hunted.space

• 
  Creatie▲850

  The one-stop product design tool amplified by AI

  AI · 2024 · creatie.ai