strange behaviour with output buffering

hi, i'm working on content management sytem entirely written in Object oriented PHP using templates i used output buffering to be able to send header calls in the middle of my classes i have noticed that performance has become "random" meaning that the same script could take from 1 up to 30 seconds in the same conditions, passing exactly the same parms. while trying to find a solution, i removed the ob_end_flush() call while keeping the ob_start() call at the beginning of the script and strangely speed of execution came back to normal. output buffering is still on i am not flushing it out the pages are generated just fine without freeing the buffer ??!!!! i would like to know if anyone has had similr experiences with output buffering this behaviour occured on a windows and a linux box both with php 4.1.1 and pretty much the same php.ini settings Regards ________________________________ Hassan El Forkani http://WarmAfrica.com EveryOne's Africa _________________________________