[Zope-dev] ZPublisher timing hooks ?

Hi all, I'd like to print a "this page was rendered in ... milliseconds" as you see on php sites. I think I'd get better accuracy by getting at least the start time from ZPublisher because.. actually it may not help, but I'm thinking about the case where a request generates a redirect and another request. I'd like to time the whole thing. Do you know if there are any facilities for this already in ZPublisher ? Any tips or pointers welcome. -Simon