--- title: Benchmark of Approximate Nearest Neighbor libraries description: A benchmark comparison of approximate nearest neighbor (ANN) libraries including Annoy, nmslib, FLANN, KGraph, Panns, Nearpy, and LSHForest. Annoy performs... canonical: https://daily.dev/posts/benchmark-of-approximate-nearest-neighbor-libraries-kkkyedgk3 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Benchmark of Approximate Nearest Neighbor libraries | daily.dev og:description: A benchmark comparison of approximate nearest neighbor (ANN) libraries including Annoy, nmslib, FLANN, KGraph, Panns, Nearpy, and LSHForest. Annoy performs... og:url: https://daily.dev/posts/benchmark-of-approximate-nearest-neighbor-libraries-kkkyedgk3 og:image: https://api.daily.dev/og/posts/KKkYedGK3.png og:image:alt: Benchmark of Approximate Nearest Neighbor libraries og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Benchmark of Approximate Nearest Neighbor libraries **[Erik Bernhardsson](https://daily.dev/sources/erikbernhardsson)** · 3 min read · 0 upvotes · 0 comments ## Summary A benchmark comparison of approximate nearest neighbor (ANN) libraries including Annoy, nmslib, FLANN, KGraph, Panns, Nearpy, and LSHForest. Annoy performs competitively, beaten only by nmslib's SW-graph (2-3x faster at same precision), while outperforming FLANN and KGraph at high precisions (>95%). Panns, Nearpy, and LSHForest perform roughly 1,000x slower than the others. The post also highlights Annoy's unique mmap-based index loading feature and its ease of installation across platforms compared to competitors. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#machine-learning](https://daily.dev/tags/machine-learning), [#vector-search](https://daily.dev/tags/vector-search) [View this post on daily.dev](https://daily.dev/posts/benchmark-of-approximate-nearest-neighbor-libraries-kkkyedgk3) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Benchmark of Approximate Nearest Neighbor libraries","url":"https://daily.dev/posts/benchmark-of-approximate-nearest-neighbor-libraries-kkkyedgk3","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/benchmark-of-approximate-nearest-neighbor-libraries-kkkyedgk3"},"datePublished":"2026-03-26T08:35:22.099Z","dateModified":"2026-03-26T08:37:15.730Z","description":"A benchmark comparison of approximate nearest neighbor (ANN) libraries including Annoy, nmslib, FLANN, KGraph, Panns, Nearpy, and LSHForest. 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