I'm lucky, I can't remember doing overnight or weekends, but for the first time we will have to do, but I'll get paid 50% of my salary for two extra working wee

I'm lucky, I can't remember doing overnight or weekends, but for the first time we will have to do, but I'll get paid 50% of my salary for two extra working weekends. It really confuses to see kids with red bulls typing code all day and night. I mean, how can you think clear and be productive that way ? You may do more, but do you do it better and deliver quality code ?