Armitage1982, I'm not sure what your question was from your last post. Could you clarify what you were asking?
Javascript can be coded in an object oriented style if you choose, just because the language doesn't have the keyword 'class' doesn't mean you can't. And I already mentioned javascript is compiled to machine code these days so is pretty fast, although obviously not as good as C++. Performance varies depending on your machine and browser so you should just try stuff out to see if it's fast enough for your purposes.