2009-12-08 10:46:35 -08:00
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<title>LuaJIT</title>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta name="Author" content="Mike Pall">
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2012-01-23 13:42:30 -08:00
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<meta name="Copyright" content="Copyright (C) 2005-2012, Mike Pall">
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2009-12-08 10:46:35 -08:00
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<meta name="Language" content="en">
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<link rel="stylesheet" type="text/css" href="bluequad.css" media="screen">
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<link rel="stylesheet" type="text/css" href="bluequad-print.css" media="print">
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2009-12-08 11:35:29 -08:00
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<meta name="description" content="LuaJIT is a Just-In-Time (JIT) compiler for the Lua language.">
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2009-12-08 10:46:35 -08:00
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</head>
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<body>
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<div id="site">
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<a href="http://luajit.org"><span>Lua<span id="logo">JIT</span></span></a>
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</div>
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<div id="head">
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<h1>LuaJIT</h1>
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</div>
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<div id="nav">
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<ul><li>
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<a class="current" href="luajit.html">LuaJIT</a>
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<ul><li>
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<a href="install.html">Installation</a>
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</li><li>
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<a href="running.html">Running</a>
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</li></ul>
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</li><li>
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<a href="extensions.html">Extensions</a>
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<ul><li>
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<a href="ext_ffi.html">FFI Library</a>
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<ul><li>
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<a href="ext_ffi_tutorial.html">FFI Tutorial</a>
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</li><li>
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<a href="ext_ffi_api.html">ffi.* API</a>
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</li><li>
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<a href="ext_ffi_semantics.html">FFI Semantics</a>
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</li></ul>
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</li><li>
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<a href="ext_jit.html">jit.* Library</a>
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</li><li>
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<a href="ext_c_api.html">Lua/C API</a>
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</li></ul>
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</li><li>
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<a href="status.html">Status</a>
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<ul><li>
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<a href="changes.html">Changes</a>
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</li></ul>
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</li><li>
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<a href="faq.html">FAQ</a>
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</li><li>
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2010-03-19 13:01:14 -07:00
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<a href="http://luajit.org/performance.html">Performance <span class="ext">»</span></a>
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</li><li>
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<a href="http://luajit.org/download.html">Download <span class="ext">»</span></a>
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</li><li>
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<a href="http://wiki.luajit.org/">Wiki <span class="ext">»</span></a>
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</li><li>
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<a href="http://luajit.org/list.html">Mailing List <span class="ext">»</span></a>
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</li></ul>
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</div>
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<div id="main">
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<p>
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LuaJIT is a <b>Just-In-Time Compiler</b> for the Lua<sup>*</sup>
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programming language.
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</p>
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<p>
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LuaJIT is Copyright © 2005-2012 Mike Pall.
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LuaJIT is open source software, released under the
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<a href="http://www.opensource.org/licenses/mit-license.php"><span class="ext">»</span> MIT license</a>.
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</p>
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<p class="indent" style="color: #606060;">
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* Lua is a powerful, dynamic and light-weight programming language
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designed for extending applications. Lua is also frequently used as a
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general-purpose, stand-alone language. More information about
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Lua can be found at: <a href="http://www.lua.org/"><span class="ext">»</span> http://www.lua.org/</a>
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</p>
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<h2>Compatibility</h2>
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<p>
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LuaJIT implements the full set of language features defined by Lua 5.1.
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The virtual machine (VM) is <b>API- and ABI-compatible</b> to the
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standard Lua interpreter and can be deployed as a drop-in replacement.
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</p>
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<p>
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LuaJIT offers more performance, at the expense of portability. It
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currently runs on all popular operating systems based on
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<b>x86</b> or <b>x64</b> CPUs (Linux, Windows, OSX etc.) or embedded
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systems based on <b>ARM</b> (Android, iOS), <b>PPC</b> or <b>MIPS</b> CPUs.
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Other platforms will be supported in the future, based on user demand
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and sponsoring.
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</p>
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<h2>Overview</h2>
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<p>
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LuaJIT has been successfully used as a <b>scripting middleware</b> in
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games, 3D modellers, numerical simulations, trading platforms and many
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other specialty applications. It combines high flexibility with high
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performance and an unmatched <b>low memory footprint</b>: less than
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<b>125K</b> for the VM plus less than <b>85K</b> for the JIT compiler (on x86).
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</p>
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<p>
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LuaJIT has been in continuous development since 2005. It's widely
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considered to be <b>one of the fastest dynamic language
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implementations</b>. It has outperformed other dynamic languages on many
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cross-language benchmarks since its first release — often by a
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substantial margin. In 2009 other dynamic language VMs started to catch up
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with the performance of LuaJIT 1.x. Well, I couldn't let that slide. ;-)
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</p>
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<p>
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2009 also marks the first release of the long-awaited <b>LuaJIT 2.0</b>.
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The whole VM has been rewritten from the ground up and relentlessly
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optimized for performance. It combines a high-speed interpreter,
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written in assembler, with a state-of-the-art JIT compiler.
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</p>
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<p>
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An innovative <b>trace compiler</b> is integrated with advanced,
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SSA-based optimizations and a highly tuned code generation backend. This
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allows a substantial reduction of the overhead associated with dynamic
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language features.
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</p>
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<p>
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It's destined to break into the <a href="http://luajit.org/performance.html"><span class="ext">»</span> performance</a>
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range traditionally reserved for offline, static language compilers.
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</p>
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<h2>More ...</h2>
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<p>
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Click on the LuaJIT sub-topics in the navigation bar to learn more
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about LuaJIT.
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</p>
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<p><p>
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Click on the Logo in the upper left corner to visit
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the LuaJIT project page on the web. All other links to online
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resources are marked with a '<span class="ext">»</span>'.
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</p>
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<br class="flush">
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</div>
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<div id="foot">
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<hr class="hide">
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2012-01-23 13:42:30 -08:00
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Copyright © 2005-2012 Mike Pall
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2009-12-08 10:46:35 -08:00
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<span class="noprint">
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·
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<a href="contact.html">Contact</a>
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</span>
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</div>
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</body>
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</html>
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