Seconded. Code reviews obviously helps for catching the small bugs/inefficiencies that the submitter hasn't thought of, but a surprising side-effect of having m

Seconded. Code reviews obviously helps for catching the small bugs/inefficiencies that the submitter hasn't thought of, but a surprising side-effect of having mandatory code reviews is that it actually helps everyone learn about the system as a whole, together. There's no better way to learn than to see someone (sometimes even yourself!) try something, hear that it's not correct, and see the fix. The failing and recovering steps are sometimes more helpful than just seeing "this is how we do it"-comments. Regarding the big diffs: sometimes it's inevitable because you're doing a big formatting of the code, or you're just doing a no-op refactoring introducing new primitives. If you do so, separate commits with one being the refactoring with no functional changes, and one being the actual changes. Makes review much easier.