I manage a few wordpress sites on shared hosting and I’ve noticed that page loading can be intermittently slow (i.e. a page loads very quickly and then the next time takes a few seconds with a very noticeable delay before the browser even starts to update).
Running the blogs through google’s page speed analyzer confirms as I will get intermittent warnings to reduce server response time (varies from 0.6s to 2s). This happens on even light pages without many images and when the page is in the cache.
I’ve looked at http://wiki.dreamhost.com/Fine_Tuning_Your_WordPress_Install and it hasn’t seemed to help.
Right now I’m running
php 5.4 fast cgi
wp supercache (mod_rewrite or php cache)
wp minify fix
a few other plugins (akismet/social media feather)
Any tips as to what I should look at to get loading times consistently fast?