The cited run times and their standard deviations were computed from five successive runs for 200 randomly selected COD structures on an unloaded Dell Precision T3500 computer with 6GB RAM and the Intel Xeon CPU W3565 running at 3.2GHz, under Ubuntu 12.04 LTS GNU/Linux 32 bit OS, using the distribution’s default Perl interpreter (version 5.14.2), the gcc compiler (version 4.6.3) and cod-tools revision 2749.

Program	cif_molecule (simple reconstruction)	cif_molecule (preserve-stoichiometry)
Run time	4 min 53s 3s	5 min 05s 8s