MAXDELAYFOREACHFEED, SLEEPBEFORESHOWRESULT and SLEEPBEFORESHOWXML value effect to script performance and server load. It is EXTREMELY important that you understand how to set and set appropriate value to them. (if you set wrong value, your server may over load, or your script may not generate results)
Configure to fit your server to Jumbofeed script and your traffic character if you have a dedicated server. (First time configuration is free of charge.)