Just, put the content that needs to be there out and as little else as possible. If downloading less (off page stuff) is important for a CLIENT device to do, i

Just, put the content that needs to be there out and as little else as possible. If downloading less (off page stuff) is important for a CLIENT device to do, it will do the lazy loading for you. If loading it or not matters the client will do so. (Anywhere that just pulls it all down is still going to do the same thing; since that's the easiest way when it doesn't matter.)