Brian Trammel just finished a well-designed and powerful Webserver 
testing suite called STOMP that he's releasing (since he's graduating 
:-).  It's posted at http://guzdial.cc.gatech.edu:8080/squeakers.157 
The documentation (PDF) is very nice, and includes a use of the suite 
to compare Comanche and Apache.  (Comanche performs at about 30% of 
Apache, overall.)

Mark
--------------------------
Mark Guzdial : Georgia Tech : College of Computing : Atlanta, GA 30332-0280
(404) 894-5618 : Fax (404) 894-0673 : guzdial at cc.gatech.edu
http://www.cc.gatech.edu/gvu/people/Faculty/Mark.Guzdial.html