I have a WordPress 3.5 multisite install using W3 Total Cache with all features except Js Minify switched on - Page cache, css minify, self-hosted cdn... pretty much the works. However, my site is still painfully slow! I can't use Js Minify (yet) because it breaks if I switch on Auto-minify. I'll need to go in and add the Js files one by one with the minify set to manual.
However, I would still hope that the site would at least show some performance improvement with most of W3TC switched on? YSlow tells me that I'm not using Gzip - although this shouldn't be the case. I'm not looking for support on W3TC as such, otherwise would post in their forum. What I'm looking for is any tips on how to investigate further and get to the root of the issues?
Any suggestions from folks experienced in this kind of work very gratefully received. The site is at http://www.harrowdirect.co.uk