Using PHP 5.3.13 and MySQL 5.5.25 on Server 2008 R2 (IIS 7.5).
I have a PHP page that pull some info from MySQL and outputs some XML. The page works fine, and takes about 5 seconds to load a very small array when the server is first booted up.
However, when I recycle the app pool for the site it begins to load instantly. If I reboot the server it loads slow again until I manually recycle the app pool.