[Zope] Zope - enterprise

Hy, is there anyone than can tell me any link or documentation about a generic Zope site (with or without CMF) performance with 1 milion of concurrenty users? In other ways, are Zope perfomance comparable with any other application server for enterprise portals solutions? tnx at all P.S excuse me for my english --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.493 / Virus Database: 292 - Release Date: 6/25/2003