Slow conversions on 6.4.1

Hi list,

I just downloaded and compiled 6.4.1 on a Debian 64 bit system.

I converted the first layer of a PSD file to png by doing

raid-devel-amd64:~# time convert test.psd[0] preview.png

real	0m8.014s
user	0m7.852s
sys	0m0.160s



Doing the same thing with my old 6.2.4 system is much much faster

debian-ipox-x64:~# time convert test.psd[0] preview.png

real	0m1.492s
user	0m1.464s
sys	0m0.028s


How come the newest version be sooo much slower?
This really keeps my back from upgrading. :(

Also tested with converting a PDF file to PNG and the 6.4.1 was slower  
but not to the same degree.

Any hinters why this is so?

Cheers,
Henke