How to organize a huge music library?

Question

iTunes

I've been using MediaMonkey for several years now. Before that, I tried Windows Media Player, Winamp, iTunes and a couple of some little-known music organizers. As a result, I settled on MM, why?
1) Knows how to search for missing tags well;
2) Auto-playlists are a very good thing;
3) Interacts with iPod/iPhone;
4) Can hold hundreds of thousands of songs;
5) Recently, it has a built-in DLNA server, which generally makes me happy.
But!
But she began to lag so much, glitch, blunt, fly out, fall off, freeze ... well, you understand.
Is there any alternative? Or maybe something can be disabled in MM so that there are no problems? Well, the player would be more comfortable than in it.