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  73 <div id="site">
  74 <a href="https://luajit.org"><span>Lua<span id="logo">JIT</span></span></a>
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  76 <div id="head">
  77 <h1>LuaJIT</h1>
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  79 <div id="nav">
  80 <ul><li>
  81 <a class="current" href="luajit.html">LuaJIT</a>
  82 <ul><li>
  83 <a href="https://luajit.org/download.html">Download <span class="ext">&raquo;</span></a>
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  85 <a href="install.html">Installation</a>
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  87 <a href="running.html">Running</a>
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  89 </li><li>
  90 <a href="extensions.html">Extensions</a>
  91 <ul><li>
  92 <a href="ext_ffi.html">FFI Library</a>
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  94 <a href="ext_ffi_tutorial.html">FFI Tutorial</a>
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  96 <a href="ext_ffi_api.html">ffi.* API</a>
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  98 <a href="ext_ffi_semantics.html">FFI Semantics</a>
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 100 </li><li>
 101 <a href="ext_buffer.html">String Buffers</a>
 102 </li><li>
 103 <a href="ext_jit.html">jit.* Library</a>
 104 </li><li>
 105 <a href="ext_c_api.html">Lua/C API</a>
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 107 <a href="ext_profiler.html">Profiler</a>
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 111 </li><li>
 112 <a href="https://luajit.org/faq.html">FAQ <span class="ext">&raquo;</span></a>
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 114 <a href="https://luajit.org/list.html">Mailing List <span class="ext">&raquo;</span></a>
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 117 <div id="main">
 118 <p>
 119 LuaJIT is a <b>Just-In-Time Compiler</b> (JIT) for the
 120 <a href="https://www.lua.org/"><span class="ext">&raquo;</span>&nbsp;Lua</a> programming language.
 121 Lua is a powerful, dynamic and light-weight programming language.
 122 It may be embedded or used as a general-purpose, stand-alone language.
 123 </p>
 124 <p>
 125 LuaJIT is Copyright &copy; 2005-2023 Mike Pall, released under the
 126 <a href="https://www.opensource.org/licenses/mit-license.php"><span class="ext">&raquo;</span>&nbsp;MIT open source license</a>.
 127 </p>
 128 <p>
 129 </p>
 130
 131 <h2>Compatibility</h2>
 132 <table class="feature os os1">
 133 <tr><td>Windows</td><td>Linux</td><td>BSD</td><td>macOS</td><td>POSIX</td></tr>
 134 </table>
 135 <table class="feature os os2">
 136 <tr><td><span style="font-size:90%;">Embedded</span></td><td>Android</td><td>iOS</td></tr>
 137 </table>
 138 <table class="feature os os3">
 139 <tr><td>PS3</td><td>PS4<br>PS5</td><td>PS Vita</td><td>Xbox 360</td><td>Xbox One</td><td>Nintendo<br>Switch</td></tr>
 140 </table>
 141 <table class="feature compiler">
 142 <tr><td>GCC</td><td>Clang<br>LLVM</td><td>MSVC</td></tr>
 143 </table>
 144 <table class="feature cpu">
 145 <tr><td>x86<br>x64</td><td>ARM<br>ARM64</td><td>PPC</td><td>MIPS32<br>MIPS64</td></tr>
 146 </table>
 147 <table class="feature fcompat">
 148 <tr><td>Lua&nbsp;5.1<br>API+ABI</td><td>+&nbsp;JIT</td><td>+&nbsp;BitOp</td><td>+&nbsp;FFI</td><td>Drop-in<br>DLL/.so</td></tr>
 149 </table>
 150
 151 <h2>Overview</h2>
 152 <p style="margin-top: 1em;">
 153 LuaJIT has been successfully used as a <b>scripting middleware</b> in
 154 games, appliances, network and graphics apps, numerical simulations,
 155 trading platforms and many other specialty applications.
 156 </p>
 157 <p>
 158 LuaJIT is part of a hundred million web sites, huge SaaS installations,
 159 network switches, set-top boxes and other embedded devices. You've probably
 160 already used LuaJIT without knowing about it.
 161 </p>
 162 <p>
 163 LuaJIT scales from embedded devices, smartphones, desktops up to server
 164 farms. It combines high flexibility with high performance and an unmatched
 165 <b>low memory footprint</b>.
 166 </p>
 167 <p>
 168 LuaJIT has been in continuous development since 2005. It's widely
 169 considered to be <b>one of the fastest dynamic language
 170 implementations</b>. It has outperformed other dynamic languages on many
 171 cross-language benchmarks since its first release &mdash; often by a
 172 substantial margin.
 173 </p>
 174 <p>
 175 For <b>LuaJIT 2.0</b>, the whole VM has been rewritten from the ground up
 176 and relentlessly optimized for performance. It combines a <b>high-speed
 177 interpreter</b>, written in assembler, with a <b>state-of-the-art JIT
 178 compiler</b>.
 179 </p>
 180 <p>
 181 An innovative <b>trace compiler</b> is integrated with advanced,
 182 SSA-based optimizations and highly tuned code generation backends.
 183 A substantial reduction of the overhead associated with dynamic languages
 184 allows it to break into the performance range traditionally reserved for
 185 offline, static language compilers.
 186 </p>
 187
 188 <h2>More ...</h2>
 189 <p>
 190 Please select a sub-topic in the navigation bar to learn more about LuaJIT.
 191 </p>
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