doc/luajit.html

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   4 <title>LuaJIT</title>
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   6 <meta name="Author" content="Mike Pall">
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  96 </head>
  97 <body>
  98 <div id="site">
  99 <a href="http://luajit.org"><span>Lua<span id="logo">JIT</span></span></a>
 100 </div>
 101 <div id="head">
 102 <h1>LuaJIT</h1>
 103 </div>
 104 <div id="nav">
 105 <ul><li>
 106 <a class="current" href="luajit.html">LuaJIT</a>
 107 <ul><li>
 108 <a href="http://luajit.org/download.html">Download <span class="ext">&raquo;</span></a>
 109 </li><li>
 110 <a href="install.html">Installation</a>
 111 </li><li>
 112 <a href="running.html">Running</a>
 113 </li></ul>
 114 </li><li>
 115 <a href="extensions.html">Extensions</a>
 116 <ul><li>
 117 <a href="ext_ffi.html">FFI Library</a>
 118 <ul><li>
 119 <a href="ext_ffi_tutorial.html">FFI Tutorial</a>
 120 </li><li>
 121 <a href="ext_ffi_api.html">ffi.* API</a>
 122 </li><li>
 123 <a href="ext_ffi_semantics.html">FFI Semantics</a>
 124 </li></ul>
 125 </li><li>
 126 <a href="ext_jit.html">jit.* Library</a>
 127 </li><li>
 128 <a href="ext_c_api.html">Lua/C API</a>
 129 </li></ul>
 130 </li><li>
 131 <a href="status.html">Status</a>
 132 <ul><li>
 133 <a href="changes.html">Changes</a>
 134 </li></ul>
 135 </li><li>
 136 <a href="faq.html">FAQ</a>
 137 </li><li>
 138 <a href="http://luajit.org/performance.html">Performance <span class="ext">&raquo;</span></a>
 139 </li><li>
 140 <a href="http://wiki.luajit.org/">Wiki <span class="ext">&raquo;</span></a>
 141 </li><li>
 142 <a href="http://luajit.org/list.html">Mailing List <span class="ext">&raquo;</span></a>
 143 </li></ul>
 144 </div>
 145 <div id="main">
 146 <p>
 147 LuaJIT is a <b>Just-In-Time Compiler</b> (JIT) for the
 148 <a href="http://www.lua.org/"><span class="ext">&raquo;</span>&nbsp;Lua</a> programming language.
 149 Lua is a powerful, dynamic and light-weight programming language.
 150 It may be embedded or used as a general-purpose, stand-alone language.
 151 </p>
 152 <p>
 153 LuaJIT is Copyright &copy; 2005-2017 Mike Pall, released under the
 154 <a href="http://www.opensource.org/licenses/mit-license.php"><span class="ext">&raquo;</span>&nbsp;MIT open source license</a>.
 155 </p>
 156 <p>
 157 </p>
 158
 159 <h2>Compatibility</h2>
 160 <table class="feature os os1">
 161 <tr><td>Windows</td><td>Linux</td><td>BSD</td><td>OSX</td><td>POSIX</td></tr>
 162 </table>
 163 <table class="feature os os2">
 164 <tr><td><span style="font-size:90%;">Embedded</span></td><td>Android</td><td>iOS</td></tr>
 165 </table>
 166 <table class="feature os os3">
 167 <tr><td>PS3</td><td>PS4</td><td>PS Vita</td><td>Xbox 360</td></tr>
 168 </table>
 169 <table class="feature compiler">
 170 <tr><td>GCC</td><td>CLANG<br>LLVM</td><td>MSVC</td></tr>
 171 </table>
 172 <table class="feature cpu">
 173 <tr><td>x86</td><td>x64</td><td>ARM</td><td>PPC</td><td>e500</td><td>MIPS</td></tr>
 174 </table>
 175 <table class="feature fcompat">
 176 <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>
 177 </table>
 178
 179 <h2>Overview</h2>
 180 <table class="feature stats">
 181 <tr>
 182 <td class="speed">3x<br>-&nbsp;&nbsp;100x</td>
 183 <td class="kb">115&nbsp;<small>KB</small><br>VM</td>
 184 <td class="kb">90&nbsp;<small>KB</small><br>JIT</td>
 185 <td class="kloc">63&nbsp;<small>KLOC</small><br>C</td>
 186 <td class="kloc">24&nbsp;<small>KLOC</small><br>ASM</td>
 187 <td class="kloc">11&nbsp;<small>KLOC</small><br>Lua</td>
 188 </tr>
 189 </table>
 190 <p style="margin-top: 1em;">
 191 LuaJIT has been successfully used as a <b>scripting middleware</b> in
 192 games, appliances, network and graphics apps, numerical simulations,
 193 trading platforms and many other specialty applications. It scales from
 194 embedded devices, smartphones, desktops up to server farms. It combines
 195 high flexibility with <a href="http://luajit.org/performance.html"><span class="ext">&raquo;</span>&nbsp;high performance</a>
 196 and an unmatched <b>low memory footprint</b>.
 197 </p>
 198 <p>
 199 LuaJIT has been in continuous development since 2005. It's widely
 200 considered to be <b>one of the fastest dynamic language
 201 implementations</b>. It has outperformed other dynamic languages on many
 202 cross-language benchmarks since its first release &mdash; often by a
 203 substantial margin.
 204 </p>
 205 <p>
 206 For <b>LuaJIT 2.0</b>, the whole VM has been rewritten from the ground up
 207 and relentlessly optimized for performance. It combines a <b>high-speed
 208 interpreter</b>, written in assembler, with a <b>state-of-the-art JIT
 209 compiler</b>.
 210 </p>
 211 <p>
 212 An innovative <b>trace compiler</b> is integrated with advanced,
 213 SSA-based optimizations and highly tuned code generation backends.
 214 A substantial reduction of the overhead associated with dynamic languages
 215 allows it to break into the performance range traditionally reserved for
 216 offline, static language compilers.
 217 </p>
 218
 219 <h2>More ...</h2>
 220 <p>
 221 Please select a sub-topic in the navigation bar to learn more about LuaJIT.
 222 </p>
 223 <br class="flush">
 224 </div>
 225 <div id="foot">
 226 <hr class="hide">
 227 Copyright &copy; 2005-2017 Mike Pall
 228 <span class="noprint">
 229 &middot;
 230 <a href="contact.html">Contact</a>
 231 </span>
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