what are/were Reddit's top two or three cached structures / things? guessing post bodies and link previews feels too easy. comment threads? post listings? wa

what are/were Reddit's top two or three cached structures / things? guessing post bodies and link previews feels too easy. comment threads? post listings? was there a lot of nesting? it sounds like you're describing a whole post--use message, comments, and all--for presentation to a browser or crawler. (sorry, saw the handle and have so many questions :D)