[development] reducing module size

I have a module whose functions are only used by logged-in users, it provides nothing to 'Anonymous' users except for a block. I'm considering loading most of the functions only when $user->uid > 0 probably in hook_init() My question is, which functions would have to be loaded in order for things not to break, apart from the block functions (and any that it uses)? Any insights would be most welcome before I try it out. -- ----------------- Bob Hutchinson Midwales dot com -----------------