[danreed07]

I'm ambivalent about this. I have a friend whose a Harvard math major, I've seen him work. He sleeps late and wakes early; when we work together, he always messes up my schedule by calling me in the middle of the night. I'm all tired and groggy the next day, and he's totally fine.

I think some people just inherently have more energy than others.

[Moru]

When I was younger I was like this. Sleep was 4-5 hours per night all days of the week. I had no troubles keeping awake and had plenty of times for coding, playing games and learn new stuff. And a fulltime job on top of that. Not so much any more, I need at least 7 hours of sleep but haven't started realy with coffee yet, don't believe the hype about it :-)