[Zope] Performance of webserver?

Hi, One of the last questions for now, I'd like to know the answer for is: What is the performance of the webserver in Zope 2? I'd like to compare to Apache on Linux (our Zope will be running on one of these). HW is PII400 and 256MB RAM. Can the webserver be used in productionenvironment? How much load can it take compared to Apache before I need to upgrade hw? The same? Half? Double? I ask because if an upgrade will be impending due to the performance of Zope's webserver, then I might as well go the Apache way now. I'd like to spare that effort, though. Best regards, Steen Suder DK