A great user in our pool [ poochiboy ] offered these tips to enhance the speed of minera lighttp refreshes:
Most of the lighthttpd optimization pulled from here:http://c-mobberley.com/wordpress/2013/05/18/raspberry-pi-lighttpd-optimisation-for-wordpress-owncloud-and-more/
Install Fast CGIsudo apt-get install php5-cgi
sudo nano /etc/php5/cgi/php.ini
Uncomment the line where it says:;cgi.fix_pathinfo=1
to showcgi.fix_pathinfo=1
Install PHP APCsudo apt-get install libpcre3-dev php-pear php5-dev build-essential
sudo pecl install apc
sudo nano /etc/php5/cgi/conf.d/apc.ini
Add the following lines to the file.
extension=apc.so
apc.enabled=1
apc.shm_size=30
Now restart lighttpdsudo service lighttpd restart
These optimizations sped up my refreshes like night and day.
EDIT: forgot the fast CGI install, many applogies: sudo apt-get install php5-cgi