I have been trying gnome-music with my music collection. It's several gigabytes 15GB of music that consists of more than 160 artists / 200 albums / 2000 songs.

When it starts filling the interface with information about albums gnome music becomes too slow, near unresponsive. Artists area, and even songs area are working.

After a while the interface starts working again, but when playing any song, it becomes unresponsive again.

I can do more testing if needed.