0.5 Kilozones per hour
I was asked dozens of times at the CeBIT, how many zones can be created with Solaris 10. My answer was (in short): 8191 or the end of your memory. Whatever occurs first. Jeff Victor gives an impressive demonstration of the capability of Solaris Zones: 1000 Zones running and 2% processor utilisation with 500 zones created within an hour. Wow. Try this with your prefered virtualisation technology based on a hypervisor.