Lua is a big name in game scripting. I chose it for my engine because it is simple, easy to integrate and has excellent performance. Anyway, I just read an article about LuaJIT , which is a just-in-time compiler for Lua that is partially sponsored by Google. It's supposed to have even more amazing performance than the standard implementation. It's also binary-compatible with the standard Lua library and interpreter, which means I'm going to try it out with my game engine ASAP.