Mike Morgan - morgamic.com » Blog Archive » Profiling PHP with Xdebug and Webgrind
http://morgamic.com/2008/06/12/profiling-php-with-xdebug-and-webgrind
"Using Webgrind and Xdebug, you to tack on ?XDEBUG_PROFILE=true to any URL and view profiling information for that particular URL instantly."