if you burn out at same time - it can take half year.

caffein makes you work TWO-FOUR times slower than you could without.

yeah, that is number i measured on self.

and yet i still do it - drugs are drugs - coffee makes me happy - cappuccino - to make effect longer and less strait compared to black shots.

also do not drink in the morning - feel pain of starting a day:)

the only reason you will not have job - you can start hating your job and leave. but you would do job more productive without coffee.