I'll give a full description, as maybe other MC users will experience the same issue.
I'm using MC 16.0.181, on a FitC2 (Atom Z530 CPU) for serving about 1500 FLAC's and MP3's to my T+A MP1260R streamer. That's just over 33GB storage, and another 56GB of movies. So I'm not talking about multiple TB's. This T+A streamer uses BridgeCo streaming solutions.
This worked fine, skipping through the menu on the T+A was fast and responsive.
Now, after an update of the T+A's firmware, walking through the menu slowed down to irritating levels. To get from "Artist" to the corresponding "Albums" take -7 seconds. So I presumed the new firmware was faulty. This has been checked by the distributor, and they said there's nothing wrong.
This new firmware is not just a simple bugfix or something, it adds gapless playback. So I can understand that this firmware is completely rewritten, as gapless is never intended for DLNA/UPnP devices. And that it can have impact on performance.
To see if the new firmware is really working fine, I installed Twonky 4.4. And yes, Twonky is much faster. Drilling don the menu takes now just 0,5 to 2 seconds maximum. The problem is that I really like MC, for it's user friendly interface, but also because of the ASIO support.
What can I do to speed up the DLNA part of MC? Is there some software tweaking to do?
And what would an SSD do? I don't know the structure of the DLNA server, but as SSD's are very good in the random read part, this could help a lot?