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Lua is a programming language that offers a very impressive set of features while keeping everything fast, small and portable. The Kepler projects uses these features to offer a faster, smaller and more portable way to develop Web applications.

Lua has a very efficient implementation. Independent benchmarks such as the Gentoo: IntelĀ® PentiumĀ® 4 Computer Language Shootout place Lua as faster when compared to Python, Perl, PHP and Ruby.

If you want to find out more about Lua you can go to the official Lua site or the Lua Wiki. For a general overview of the language characteristics you can check the About Lua page. You can also consult one of the several books about Lua, including Programming in Lua by one of the Lua's authors, Roberto Ierusalimschy.

The Lua community is constantly contributing new modules, many of which can be found on LuaForge.