1. Tasks take 50% more time to complete.
2. The probability of screw up increases. And it really shoots up beyond 10hrs or so.
3. Net result, I take more time cleaning up the mess I created than if I had worked on them at a normal pace.
It’s like a over speeding car taking more time to reach the destination because it either took a wrong route or its engine broke down and had to be replaced.
In my mind at the time I felt like it was being productive and doing good. Reality was that it was a lot of clicking around, trying to focus was impossible and my productivity was just shot.
Now I work solidly for 7 hours and that's it. If I have enough juice to be able to focus on an article or do some of my course then I'll do it but if I have to re-read the same sentence 3 times, I tap out. Tomorrow is a new day and so far my obsession with 'optimizing' every waking minute has provided me with exactly nothing so now I'm trying to switch things up to a more placid life.
When I bring up my concentration, my brain is much faster and I'm more impatient. So I had to buy a very fast computer
Less intensive work can be done for a few hours more, after that it is pure wasting of time.
[1] https://www.forbes.com/sites/rickferri/2012/12/20/any-monkey...
This isn't what bankers do.