[PyMOL] very slow script for distance calculation

[andrea s. <and...@gm...>]

Hi all,
is it normal that a script in pymol runs very very slow. In my case I am 
just selecting a residue of a protein and calculating the distance from 
the ligand atoms. I am doing this in a loop over 100 molecule. It took 
ca. 6 hours...!
My memory is 50% free (1Gb total). I am using this script in shell 
without gui.

thanks in advance

Regards,

andrea