> The "loader script" is a basic if(!lib.func) { do the magic }. Its one extra thing I suppose. For the overall page load there are lower hanging fruit. That's

> The "loader script" is a basic if(!lib.func) { do the magic }. Its one extra thing I suppose. For the overall page load there are lower hanging fruit. That's still a 100-200ms if the user is not on the same continent as your server.