Javascript engines certainly have the best marketing going for them :) But Lua is a much simpler language and its much easier to write a JIT compiler for it tha

Javascript engines certainly have the best marketing going for them :) But Lua is a much simpler language and its much easier to write a JIT compiler for it than Javascript. And if it comes to quality of programmers, LuaJIT has Mike Pall which is a bit of a legend for those who heard of him.