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Re:The Effect of Sleep on Happiness by jeffwass on Wednesday July 18, 2018 @06:00PM (#17562427)
This!

I found in university, strangely through sheer accident, (during the first two years of my PhD program in physics) that I performed best on my final exams and written qualifiers with three hours of sleep.

I would sleep 3 hours after late-night study, drink a lot of coffee, and then be able to hyper-focus like a felon on a three-hour-long exam.

Re:The Effect of Sleep on Happiness by andai on Wednesday July 18, 2018 @06:33PM (#17562588)
How was the recovery?
Re:The Effect of Sleep on Happiness by jeffwass on Thursday July 19, 2018 @01:50PM (#17568755)
Not ideal, but in some cases manageable for several days.

Eg, I remember doing 3 qualifiers on Mon, Wed, and Fri in one week, so a small nap and then back to studying for the next one.

Not a fun week, that.