For a good bit, I worked 4 hour days (plus probably an hour of planning time): but I didn't go to work till after 5, and I spent all 4 hours on the machine, cod

For a good bit, I worked 4 hour days (plus probably an hour of planning time): but I didn't go to work till after 5, and I spent all 4 hours on the machine, coding and testing. It was one of the most productive periods of my career.