Mine is nice and quick in regards to the web interface and general functions. However I run it on a server at home and my upload speed isn't the best, so if I need to pull a larger file (Files On Demand enabled) then obviously the transfer speed of the file is a bit sluggish.
Hosted on a VM with 16GB RAM, 4 cores. Using the NextcloudAIO docker deployment option, all behind an Apache reverse proxy (I have a bunch of other services on another VM that all have reverse proxy access in place as well).