Update 17-Oct: Added .lines, fixed some spelling mistakes, added pageheap Here is the sequence of events for two back-to-back FastCGI requests to a freshly started worker process: Request 1: HTTP GET /hello.php IIS (iiscore.dll) looks up handler in system.webServer/handlers, find FastCGI module The FastCGI module (iisfcgi.dll) looks up handlers@scriptProcessor in fastCgi/applications The FastCGI m