How to speed up Amarok
Amarok is one of the more popular music players on Linux. By default, it uses SQLite to manage its database of songs and playlists. However, there is a way to speed it up by using full database back-end such as MySQL and PostgreSQL.
Here's a short but useful blog entry on how to setup and configure MySQL for Amarok.
Now, if only you can do the same for e-mail clients, it would have been faster and easier to archive.