I really get mystified when I read things like that. I am not doubting you mbu10, but I just can't figure it out! I have over 65K tracks, about 13K artists and my music in MP loads in less than a second either in DB views or in Shares view. Of course I have separate folders for each artist/album, my music is all nicely tagged and indexed in the DB as well, but still!the folders view takes a couple of seconds to load compared to mediaportal 2 mins to read my music folder.(libary mode excluded here that is about the same)
I don't even have a fancy system. It must be 3-4 yrs old now (E6600) AND I just run my 42" TV as a secondary monitor via HDMI, so my PC is often running a lot of processes in the background while I use MP. It doesn't even notice! I have read posts from users saying MP uses a lot of resources, but for me it uses less memory than FF (hog) Opera or Chrome for god's sake! When using MP, my CPU load increases only 5-10% (other than occasional spikes, but not for more than a second ) even if I am playing a film and browsing through the GUI. Plus I have over 50 plugins installed.
So I don't understand. What could make such a difference?