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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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  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>
  84 </li><li>
  85 <a href="install.html">Installation</a>
  86 </li><li>
  87 <a href="running.html">Running</a>
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  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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 101 <a href="ext_jit.html">jit.* Library</a>
 102 </li><li>
 103 <a href="ext_c_api.html">Lua/C API</a>
 104 </li></ul>
 105 </li><li>
 106 <a href="https://luajit.org/status.html">Status <span class="ext">&raquo;</span></a>
 107 </li><li>
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 110 <a href="https://luajit.org/list.html">Mailing List <span class="ext">&raquo;</span></a>
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 113 <div id="main">
 114 <p>
 115 LuaJIT is a <b>Just-In-Time Compiler</b> (JIT) for the
 116 <a href="https://www.lua.org/"><span class="ext">&raquo;</span>&nbsp;Lua</a> programming language.
 117 Lua is a powerful, dynamic and light-weight programming language.
 118 It may be embedded or used as a general-purpose, stand-alone language.
 119 </p>
 120 <p>
 121 LuaJIT is Copyright &copy; 2005-2023 Mike Pall, released under the
 122 <a href="https://www.opensource.org/licenses/mit-license.php"><span class="ext">&raquo;</span>&nbsp;MIT open source license</a>.
 123 </p>
 124 <p>
 125 </p>
 126
 127 <h2>Compatibility</h2>
 128 <table class="feature os os1">
 129 <tr><td>Windows</td><td>Linux</td><td>BSD</td><td>macOS</td><td>POSIX</td></tr>
 130 </table>
 131 <table class="feature os os2">
 132 <tr><td><span style="font-size:90%;">Embedded</span></td><td>Android</td><td>iOS</td></tr>
 133 </table>
 134 <table class="feature os os3">
 135 <tr><td>PS3</td><td>PS4</td><td>PS Vita</td><td>Xbox 360</td></tr>
 136 </table>
 137 <table class="feature compiler">
 138 <tr><td>GCC</td><td>CLANG<br>LLVM</td><td>MSVC</td></tr>
 139 </table>
 140 <table class="feature cpu">
 141 <tr><td>x86</td><td>x64</td><td>ARM</td><td>PPC</td><td>e500</td><td>MIPS</td></tr>
 142 </table>
 143 <table class="feature fcompat">
 144 <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>
 145 </table>
 146
 147 <h2>Overview</h2>
 148 <p style="margin-top: 1em;">
 149 LuaJIT has been successfully used as a <b>scripting middleware</b> in
 150 games, appliances, network and graphics apps, numerical simulations,
 151 trading platforms and many other specialty applications.
 152 </p>
 153 <p>
 154 LuaJIT is part of a hundred million web sites, huge SaaS installations,
 155 network switches, set-top boxes and other embedded devices. You've probably
 156 already used LuaJIT without knowing about it.
 157 </p>
 158 <p>
 159 LuaJIT scales from embedded devices, smartphones, desktops up to server
 160 farms. It combines high flexibility with high performance and an unmatched
 161 <b>low memory footprint</b>.
 162 </p>
 163 <p>
 164 LuaJIT has been in continuous development since 2005. It's widely
 165 considered to be <b>one of the fastest dynamic language
 166 implementations</b>. It has outperformed other dynamic languages on many
 167 cross-language benchmarks since its first release &mdash; often by a
 168 substantial margin.
 169 </p>
 170 <p>
 171 For <b>LuaJIT 2.0</b>, the whole VM has been rewritten from the ground up
 172 and relentlessly optimized for performance. It combines a <b>high-speed
 173 interpreter</b>, written in assembler, with a <b>state-of-the-art JIT
 174 compiler</b>.
 175 </p>
 176 <p>
 177 An innovative <b>trace compiler</b> is integrated with advanced,
 178 SSA-based optimizations and highly tuned code generation backends.
 179 A substantial reduction of the overhead associated with dynamic languages
 180 allows it to break into the performance range traditionally reserved for
 181 offline, static language compilers.
 182 </p>
 183
 184 <h2>More ...</h2>
 185 <p>
 186 Please select a sub-topic in the navigation bar to learn more about LuaJIT.
 187 </p>
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