We have LFDS 10.3 deployed at a multitude of places, and in every single one of them, it is really, really slow. Simple CRUD actions, such as viewing user profiles and changing profile info, take up to 10 seconds per action. I timed a simple scenario whereby I created several user accounts and changed the info of a few others in succession, and I measured that I spent more time watching the loader spinner than actually entering data.
The servers are quite beefy, so it's definitely not due to lack of resources. And since the issue occurs even when the LFDS database is on the same machine, the network is not the problem either. This leads me to believe the inefficiency lies elsewhere (perhaps in the data model?).
Anyway, really hoping for some major performance enhancements in the upcoming version because it's currently a big pain to use.