I once wrote a bubble sort into production code, because the total number of elements to sort rarely exceeded 4 and it was what I could do off the top of my hea

I once wrote a bubble sort into production code, because the total number of elements to sort rarely exceeded 4 and it was what I could do off the top of my head. I don't remember if I left a comment explaining the reasoning, but I think I did. A year later a new feature invalidated my assumption about the number of elements and the sort was way too slow. I'm sure the person who inherited that code cursed me a few times.