Show HN: Opthash – Rust implementations of Elastic and Funnel hashing

Category: library

Tags: hash-map, open-addressing, rust

Score: 7.3/10 (Innovation: 8, Technical: 8, Documentation: 7, Utility: 6)

Opthash provides Rust implementations of Elastic and Funnel hashing, two novel open-addressing hash map algorithms from a 2025 research paper that achieve optimal expected probe complexity without reordering. It combines cutting-edge theoretical advances with practical SIMD-optimized design and Rust/Python bindings, making it interesting for high-performance computing and systems programming.

Target audience: backend devs, systems programmers, data engineers

Repository: https://github.com/aaron-ang/opthash-rs · Rust · Apache-2.0 · 6 stars

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