Version 10.0 is insanely slow

I just updated from 9.6 to 10.0. Making simple changes often makes the spinner take off:

It been running for 5 mins before I decided to make this post and all i did was change the rating of a few photos and set the exposure of another. 

I have a Mac M4, 32 GB RAM and never had issues like this before. Editing time has more than doubled waiting for this spinner (it still running btw). So _another_ restart is coming up due to disabled controls:

I am reverting to 9 until this is fixed.