I downloaded and installed Mezzmo, added my movies folder to it.

When browsing to each folder, or after selecting a movie and updating the metadata (right-click->properties->Get Online Video Metadata->Search->(Choosing the right movie)->Ok->Ok),
it will take 10+ seconds to update the view and it will hog the cursor with a busy marker while it's happening so I can't do anything else. The time it takes to finish seems to scale with
the number of movies in that folder. With only about 13 movies it only take a second or two, but with 63 movies in a folder it takes a loooong time. This seems totally off the charts bad
in terms of performance. It becomes really problematic when I have to go through and fix metadata for every movie in the folder and it takes hours because of this.

Am I doing something wrong? Are there settings I can fix? Otherwise, this seems like one of the best DLNA servers...