[squid-users] Performance tips for squid 3 (config file included)?

I'm a newbie. To get Squid started all I was able to do is create the
config below. This works but it feels like it could be a little
faster. I have about 300 users.
Are there any other options that you would recommend adding to this
config file? This is my config file for Squid 3.0 on Debian, P4, 40GB
IDE disk.

refresh_pattern -i \.index.(html|htm)$ 0 40% 10080
refresh_pattern -i \.(html|htm|css|js)$ 1440 40% 40320
refresh_pattern . 0 40% 40320
cache_dir ufs /var/spool/squid3 7000 16 256
visible_hostname proxy.ourdomain.com
http_port 176.16.0.9:3128 transparent
acl localnet src 176.16.0.0/255.255.248.0
http_access allow localnet
debug_options ALL,1
access_log /var/log/squid3/access.log squid
Received on Fri Sep 17 2010 - 18:00:16 MDT