Subject: Re: OT: Dunning-Kruger effect
And I once wrote in 6502 assembler a super-flexible quicksort routine that could sort every kind of data arrays, integers, strings etc. I optimised and optimised it, before I finally showed it to a fellow programmer I highly respected, proclaiming:

"This routine is perfect! There is not one superfluous byte. You won't be able to shorten it by a single byte!"

After looking for less than 1min at the code he said "This comparison here: If you do it like this.... it's one byte shorter". Deeply humbling.