6-7 hours of non-stop coding is what I usually do...
I have coded for about 30 hours without sleeping and I just felt a little dizzy and had to sleep afterwards; But no shivers or anything else...

I think you have to sit properly and about every 30 minutes rest your eyes by looking far distances and your fingers and hand by straighten them for 1-2 minutes.

I hope good coding times for you ;)

@devTea
Already on it!
Reached 30 hours!
But 1 coffee...

I hoped humans were able to don't sleep at all! It would've been great :)

Have you ever used windows?!😐