The loading time for the page (general loading time, PHP load, MySQL load, etc.).
MySQL: [^qt^], [^q^] request(s), PHP: [^p^], total: [^t^], document retrieved from [^s^].
This is from the demo site and will return something like this:
MySQL: 0.0252 s, 17 request(s), PHP: 0.2314 s, total: 0.2566 s, document retrieved from database.
