Well fwiw, I personally have pulled honest-to-goodness all-nighters in exceptional circumstances (debugging production problem, team (including management) expe

Well fwiw, I personally have pulled honest-to-goodness all-nighters in exceptional circumstances (debugging production problem, team (including management) expecting my code the next morning to start release-testing, etc. Of course it includes things like bio-breaks, snacks/coffee etc. But since "The night is a programmer's best friend for it is silent and expects nothing"(1), it's not that hard to get back into the zone after a break especially with a sword hanging over your head. (1) Me. Just now.