[rwallace]

I'll let you into a secret: four hours of concentrated, high-quality thinking a day is about the limit of what the rest of us can do as well. I don't know whether that's a human universal, but if there are exceptions, they are exceptional indeed. A programmer working eight hours a day is at best doing four hours of high-quality concentrated work and four hours of random crap like attending meetings, checking e-mail and reading HN.

In other words, don't worry about your future in the industry. You're doing fine.

[abduhl]

I've been noticing this type of thinking a lot on HN. It simply isn't true. I am not in the tech industry (if you search my comment history you'll find I do underground tunneling) but everybody I have interacted with at my firm that is above the junior level (and the majority of those at the junior level) puts in far more than 4 hours of concentrated, high-quality thinking a day.

Out of the normal 45 to 60 hours I work a week when I am doing design work, at least 75% of that time is spent doing high level thinking. I am not an anomaly in my firm.

I don't accept nor do I respect the idea that a person is only good for a couple of hours of high quality work to their employer per day.

[kybernetikos]

My understanding is that most studies suggest that working around the 60 hours per week mark results in diminished productivity compared to 40 hours per week after only about 3 weeks.

On the other hand, I think people who say that they are only able to get through 4 hours of work in a day, really specifically mean programming. And it's probably true in that limited sense, but all the other stuff - communicating with others so you know what program to write, helping others so they can work more effectively, is actually very valuable. It's just a common programmer failing to not really see that stuff as 'real work'. It's even worse as programmers get promotions and are expected to spend a significant amount of their time on management type activities.