Do you tell your manager when a task takes you way less time than they think?
I work at a mid size company, been here a bit over two years. Somewhere in the last year I got a lot faster at my recurring stuff and I never told anyone, mainly because I got lazy and kept researching how to automate my tasks, like our monthly variance pack which used to eat a whole morning, I rebuilt most of it in Cube, templated straight into the sheet and now it's maybe 40mns and half of that is me double checking it because I don't trust that it was that easy, and the accrual support docs, all those invoices someone used to key in by hand now just goes through Hypatos and their data comes in structured, Im assigned the supervision role in it and I get more time to check outcomes than I need to. None of this was "sly" type of clever nor groundbreaking in any way but as they say, give a lazy person a hard task and they'll find the best way to do it, and Im a very, very lazy person.
My manager still thinks these take as long as they used to so I don't know what I'm supposed to do with my spare time. Do you just say nothing? Deepen your analyses and improve quality? Ask for more tasks/roles and try to negotiate higher pay? Learn a new language? I feel a bit guilty for what's essentially working 4 hours and getting paid for 8, but Im also hesitant to say it because I dont want to be punished for being efficient