ann-algorithms

Approximate Nearest Neighbor algorithm theory and selection. HNSW, IVF, IVF+PQ, ScaNN, DiskANN, LSH. Covers parameter effects (m, ef, nlist, nprobe), recall/latency/memory tradeoffs, exhaustive vs approximate, and when to pick which index. USE WHEN: user mentions "ANN", "HNSW", "IVF", "nearest neighbor", "ScaNN", "DiskANN", "LSH", "recall vs latency", "ind…

Independent GitHub snapshot · Automated classification · Original documentation governs