What hardware are you running on?
2016 15" Macbook Pro with the 2.6 and the 460pro.
It takes literal seconds to complete a task in Finder. You double click, and you have a good 1-5 seconds before anything occurs. After an hour with Apple support today, it appears the only fix is to roll back.
I have a similar machine as yours and Mojave is super fast. I did a clean install with FileVault encryption, by the way encryption took only 25 minutes to do it's job with a 250GB drive.
I just purchased a 2017 21.5" iMac. I have not upgraded yet - it has been acting slow and funky since I got it a few days ago. It is brand new. Do you think the update will help it? I am probably going to return it to BB in a few days. I need to be able to upgrade the ram.Speed and responsiveness feels about the same as HS to me on a 2017 iMac, which is quite good.
No – it's rollback time. That's the only solution Apple could identify.
Wait.... Apple officially suggested you don't use their latest operating system on a 2-year old MacBook Pro? I mean, even if Mojave was slower, Apple would never suggest you don't use their latest OS. Not sure who you talked to, but I think they just didn't want to deal with you.
Anyway, as many, many people here can attest to - Mojave does not work slower on supported Macs, and waiting a few seconds in Finder is not normal and may be indicative of some problems with your Mac. It's not Mojave.
Cinebench tells me openGL is 33% faster, I used to get 77 fps, now 104.