Slow browsing files (cpu load 100%)

Hello!

I installed Serviio 1.0.1 on my qnap ts-219PII and it works but... it works soooo slow when browsing files. For a folder with about 200 subfolders inside I have to wait ...~15-20 seconds? At the time cpu load is 100% (java process).
I want to use it just for music (no movies, no pictures etc) so don't need any transcoding. Actually when it just plays something cpu load is around... 1%... when I start to browse other folders... 100% again.

Do you have any idea how to correct this issue?

another information.. In serviio log I can see bilions of lines like these:


2012-10-11 01:30:31,771 INFO [LibraryUpdatesCheckerThread] Updated 'Ashes' (/share/Music/FTP/Desiderii Marginis/Desiderii Marginis - Songs Over Ruins/06. Ashes.mp3) in Library
2012-10-11 01:30:31,788 WARN [LibraryManager] Cannot read metadata of file /share/Music/FTP/Atrium Carceri/Atrium Carceri - Seishinbyouin/05. Twisted Foetus.mp3 via extractor COVER_IMAGE_IN_FOLDER. Message: Not a Valid TIFF File


maybe this will help resolve the problem.

Nothing? No one knows?

Is it looking for a cover? Can I disable this feature? I don't really care about covers...

[will]

Under the Metadata tab, untick the box to use local album covers for audio.

I cleared "retrieve descriptive metadata" and "look for local album art image" and these warn logs are gone but... it is stil soooooo slow...
Please help.