Please describe the problem:
Having a large music database (4500+ songs) causes Banshee to constantly freeze
and spike to 100% CPU usage when moving in between Music Library and either
playlists or devices (such as an iPod). 

Steps to reproduce:
1. Drag a song from Music Library (main database) and create a new playlist (OR)
enter a song in the search field.
2. Go back to the Music Library
3. Banshee now freezes and CPU spikes too 100% for a few minutes. Banshee then
finally loads the Music Library


Actual results:
Banshee freezes

Expected results:
Banshee should not freeze.

Does this happen every time?
Yes

Other information:
Perhaps a better (or robust) way of caching files is needed for people with
quite large music libraries? Banshee is really crippled due to this type of
behaviour.