I didn't like how slow the tracks were being shown so I tested a bit, and it seems the spotify search is slowing it down. I uploaded a new version where the spotify link and last.fm link is removed by default. They can be shown by adding:
to the url. The last.fm icon doesn't slow anything down, but the spotify does, for now at least.
The free host I'm using is still slow at times, but the page should load much faster now without spotify.