[Freeswitch-dev] JavaScript - how bad is it?

Hi, I know from a previous postings/discussions that the Javascript we use is considered to be bad - performance and memory wise. Can someone explain a little - who did the Javascript integration? The reason I ask is because I am working on ccxml and vxml - and I need to add ECMAScript due to compatibility with external tools/libraries . The impression I get from wiki is that Lua perform 2 x the speed of JavaScript - does anyone know exactly why? Jan