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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="This crate is a Rust port of Google’s high-performance SwissTable hash map, adapted to make it a drop-in replacement for Rust’s standard `HashMap` and `HashSet` types."><title>hashbrown - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-b0742ba02757f159.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="hashbrown" data-themes="" data-resource-suffix="" data-rustdoc-version="1.83.0 (90b35a623 2024-11-26)" data-channel="1.83.0" data-search-js="search-f0d225181b97f9a4.js" data-settings-js="settings-805db61a62df4bd2.js" ><script src="../static.files/storage-1d39b6787ed640ff.js"></script><script defer src="../crates.js"></script><script defer src="../static.files/main-f070b9041d14864c.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-0111fcff984fae8f.css"></noscript><link rel="alternate icon" type="image/png" href="../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc mod crate"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle" title="show sidebar"></button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../hashbrown/index.html">hashbrown</a><span class="version">0.15.2</span></h2></div><div class="sidebar-elems"><ul class="block"><li><a id="all-types" href="all.html">All Items</a></li></ul><section id="rustdoc-toc"><h3><a href="#modules">Crate Items</a></h3><ul class="block"><li><a href="#modules" title="Modules">Modules</a></li><li><a href="#structs" title="Structs">Structs</a></li><li><a href="#enums" title="Enums">Enums</a></li><li><a href="#traits" title="Traits">Traits</a></li></ul></section><div id="rustdoc-modnav"></div></div></nav><div class="sidebar-resizer"></div><main><div class="width-limiter"><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1>Crate <span>hashbrown</span><button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../src/hashbrown/lib.rs.html#1-181">source</a> </span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>This crate is a Rust port of Google’s high-performance <a href="https://abseil.io/blog/20180927-swisstables">SwissTable</a> hash
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map, adapted to make it a drop-in replacement for Rust’s standard <code>HashMap</code>
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and <code>HashSet</code> types.</p>
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<p>The original C++ version of <a href="https://abseil.io/blog/20180927-swisstables">SwissTable</a> can be found <a href="https://github.com/abseil/abseil-cpp/blob/master/absl/container/internal/raw_hash_set.h">here</a>, and this
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<a href="https://www.youtube.com/watch?v=ncHmEUmJZf4">CppCon talk</a> gives an overview of how the algorithm works.</p>
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</div></details><h2 id="modules" class="section-header">Modules<a href="#modules" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="mod" href="hash_map/index.html" title="mod hashbrown::hash_map">hash_<wbr>map</a></div><div class="desc docblock-short">A hash map implemented with quadratic probing and SIMD lookup.</div></li><li><div class="item-name"><a class="mod" href="hash_set/index.html" title="mod hashbrown::hash_set">hash_<wbr>set</a></div><div class="desc docblock-short">A hash set implemented as a <code>HashMap</code> where the value is <code>()</code>.</div></li><li><div class="item-name"><a class="mod" href="hash_table/index.html" title="mod hashbrown::hash_table">hash_<wbr>table</a></div><div class="desc docblock-short">A hash table implemented with quadratic probing and SIMD lookup.</div></li></ul><h2 id="structs" class="section-header">Structs<a href="#structs" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="struct" href="struct.HashMap.html" title="struct hashbrown::HashMap">HashMap</a></div><div class="desc docblock-short">A hash map implemented with quadratic probing and SIMD lookup.</div></li><li><div class="item-name"><a class="struct" href="struct.HashSet.html" title="struct hashbrown::HashSet">HashSet</a></div><div class="desc docblock-short">A hash set implemented as a <code>HashMap</code> where the value is <code>()</code>.</div></li><li><div class="item-name"><a class="struct" href="struct.HashTable.html" title="struct hashbrown::HashTable">Hash<wbr>Table</a></div><div class="desc docblock-short">Low-level hash table with explicit hashing.</div></li></ul><h2 id="enums" class="section-header">Enums<a href="#enums" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="enum" href="enum.DefaultHashBuilder.html" title="enum hashbrown::DefaultHashBuilder">Default<wbr>Hash<wbr>Builder</a></div><div class="desc docblock-short">Dummy default hasher for <a href="hash_map/struct.HashMap.html" title="struct hashbrown::hash_map::HashMap"><code>HashMap</code></a> and <a href="hash_set/struct.HashSet.html" title="struct hashbrown::hash_set::HashSet"><code>HashSet</code></a>.</div></li><li><div class="item-name"><a class="enum" href="enum.TryReserveError.html" title="enum hashbrown::TryReserveError">TryReserve<wbr>Error</a></div><div class="desc docblock-short">The error type for <code>try_reserve</code> methods.</div></li></ul><h2 id="traits" class="section-header">Traits<a href="#traits" class="anchor">§</a></h2><ul class="item-table"><li><div class="item-name"><a class="trait" href="trait.Equivalent.html" title="trait hashbrown::Equivalent">Equivalent</a></div><div class="desc docblock-short">Key equivalence trait.</div></li></ul></section></div></main></body></html>
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