WARNING: This tool is under strong development, please be aware about!
It's possible to accelerate UPnP Device discovery by creating a cronjob e.g. "/1 * www-data cd /var/www/pupnp; php discover.php"
The file cronjob.php makes the discovery request to search all UPnP enabled devices in the your network.
It can also be run from command line by using $ php cronjob.php
or ideally add it to your crontab.