"Why are some features done very fast, and some very slowly?"
Well you see, I'm nothing more than a punny human. As such, there's a ton of stuff that I don't know. Even worse, human beings have this defect of rarely being 100% efficient, so my performance may vary a bit.
It may be hard to understand for a manager, as lizard people are quite a different species.

Just wanted to get on the bandwagon 😆