There is one clock you should be watching regardless, which is the clock of your life. Your code will not come see you in the hospital, or cheer you up when you're having a rough day. You wont be sitting around at 70 wishing you had spent more 3am nights debugging something. When your back gives out from 18hrs a day of grinding at a desk to get something out, and you can barely walk from the sciatica, you wont be thinking about that great new feature you shipped. There are far more important things in life once you come to terms with that, and you will learn that the whole point of the former is enabling the latter.