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<div id="site">
<a href="http://luajit.org"><span>Lua<span id="logo">JIT</span></span></a>
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<h1>LuaJIT</h1>
</div>
<div id="nav">
<ul><li>
<a class="current" href="luajit.html">LuaJIT</a>
<ul><li>
<a href="http://luajit.org/download.html">Download <span class="ext">&raquo;</span></a>
</li><li>
<a href="install.html">Installation</a>
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<a href="running.html">Running</a>
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</li><li>
<a href="extensions.html">Extensions</a>
<ul><li>
<a href="ext_ffi.html">FFI Library</a>
<ul><li>
<a href="ext_ffi_tutorial.html">FFI Tutorial</a>
</li><li>
<a href="ext_ffi_api.html">ffi.* API</a>
</li><li>
<a href="ext_ffi_semantics.html">FFI Semantics</a>
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</li><li>
<a href="ext_jit.html">jit.* Library</a>
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<a href="ext_c_api.html">Lua/C API</a>
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<a href="changes.html">Changes</a>
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<a href="faq.html">FAQ</a>
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<a href="http://luajit.org/performance.html">Performance <span class="ext">&raquo;</span></a>
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<a href="http://wiki.luajit.org/">Wiki <span class="ext">&raquo;</span></a>
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<p>
LuaJIT is a <b>Just-In-Time Compiler</b> (JIT) for the
<a href="http://www.lua.org/"><span class="ext">&raquo;</span>&nbsp;Lua</a> programming language.
Lua is a powerful, dynamic and light-weight programming language.
It may be embedded or used as a general-purpose, stand-alone language.
</p>
<p>
LuaJIT is Copyright &copy; 2005-2017 Mike Pall, released under the
<a href="http://www.opensource.org/licenses/mit-license.php"><span class="ext">&raquo;</span>&nbsp;MIT open source license</a>.
</p>
<p>
</p>

<h2>Compatibility</h2>
<table class="feature os os1">
<tr><td>Windows</td><td>Linux</td><td>BSD</td><td>OSX</td><td>POSIX</td></tr>
</table>
<table class="feature os os2">
<tr><td><span style="font-size:90%;">Embedded</span></td><td>Android</td><td>iOS</td></tr>
</table>
<table class="feature os os3">
<tr><td>PS3</td><td>PS4</td><td>PS Vita</td><td>Xbox 360</td></tr>
</table>
<table class="feature compiler">
<tr><td>GCC</td><td>CLANG<br>LLVM</td><td>MSVC</td></tr>
</table>
<table class="feature cpu">
<tr><td>x86</td><td>x64</td><td>ARM</td><td>PPC</td><td>e500</td><td>MIPS</td></tr>
</table>
<table class="feature fcompat">
<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>
</table>

<h2>Overview</h2>
<table class="feature stats">
<tr>
<td class="speed">3x<br>-&nbsp;&nbsp;100x</td>
<td class="kb">115&nbsp;<small>KB</small><br>VM</td>
<td class="kb">90&nbsp;<small>KB</small><br>JIT</td>
<td class="kloc">63&nbsp;<small>KLOC</small><br>C</td>
<td class="kloc">24&nbsp;<small>KLOC</small><br>ASM</td>
<td class="kloc">11&nbsp;<small>KLOC</small><br>Lua</td>
</tr>
</table>
<p style="margin-top: 1em;">
LuaJIT has been successfully used as a <b>scripting middleware</b> in
games, appliances, network and graphics apps, numerical simulations,
trading platforms and many other specialty applications. It scales from
embedded devices, smartphones, desktops up to server farms. It combines
high flexibility with <a href="http://luajit.org/performance.html"><span class="ext">&raquo;</span>&nbsp;high performance</a>
and an unmatched <b>low memory footprint</b>.
</p>
<p>
LuaJIT has been in continuous development since 2005. It's widely
considered to be <b>one of the fastest dynamic language
implementations</b>. It has outperformed other dynamic languages on many
cross-language benchmarks since its first release &mdash; often by a
substantial margin.
</p>
<p>
For <b>LuaJIT 2.0</b>, the whole VM has been rewritten from the ground up
and relentlessly optimized for performance. It combines a <b>high-speed
interpreter</b>, written in assembler, with a <b>state-of-the-art JIT
compiler</b>.
</p>
<p>
An innovative <b>trace compiler</b> is integrated with advanced,
SSA-based optimizations and highly tuned code generation backends.
A substantial reduction of the overhead associated with dynamic languages
allows it to break into the performance range traditionally reserved for
offline, static language compilers.
</p>

<h2>More ...</h2>
<p>
Please select a sub-topic in the navigation bar to learn more about LuaJIT.
</p>
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Copyright &copy; 2005-2017 Mike Pall
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