I have come to the conclusion that 5hr30min is the optimal amount of sleeping

[kathisterima]

for someone who wants to be productive and have as many hrs/day as possible but at the same time not have the negative repercussions of sleeping too little

I've seen virtually no difference between sleeping 8, 9, 10 hours of sleep and 5h30, and also the more hours you add the more shit you feel in some way, but that's probably psychological pressure

also, sleeping on hard surface is invaluable (water is wet) and half sleeping on bus, bench etc doesn't count as sleep because your body doesn't relax completely

would like to hear your insight @MVP @brocode @"зайчик"