unum-cloud/USearch
Fast Open-Source Search & Clustering engine × for Vectors & Arbitrary Objects × in C++, C, Python, JavaScript, Rust, Java, Objective-C, Swift, C#, GoLang, and Wolfram 🔍
Implements HNSW (Hierarchical Navigable Small World) with SIMD optimizations across x86 AVX-512 and Arm SVE, supporting arbitrary distance metrics including user-defined functions with JIT compilation. Designed as a single-header C++11 library with native bindings for 10+ languages, offering 10x faster indexing than FAISS while maintaining a 3K SLOC footprint. Integrates as vector search backends for ClickHouse, DuckDB, and SQLite, with support for half-precision and quarter-precision quantization, on-disk index streaming, and heterogeneous filtering.
3,952 stars.
Stars
3,952
Forks
298
Language
C++
License
Apache-2.0
Category
Last pushed
Mar 02, 2026
Commits (30d)
0
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