[yason]

So it's really 6-12 hours. You're working on the code in the background; you probably couldn't just have written it three hours straight. Or more likely, you were sorting out the details within the 12-hour period but you had been toying around with the idea for days if not weeks.

Just guessing and certainly not trying to look down your work, it's beautiful. It's beautiful even if it had taken a week to write. The time to write it is just interesting because it is exactly this that makes programming hard to measure.

How does any explain his productivity to a boss if you get seemingly nothing done for four days and then write a nearly complete solution on the fifth day? How much is one actually working after all, counting all the time that affects the work? Does it count as work if you go biking on a Saturday but you kind of subconsciously think about your work and then you write great stuff on Monday, thanks to that?

One thing is for sure: you're much better off measuring a programmer's efforts by his accomplishments instead of the time to do them. This is backed up by the fact that an entrepreneur programmer gets rewarded much more fairly than a salaried programmer.