I have been through all of the standard things for speeding up magento 1.8:
Compressed and combined stylesheets and javascripts. Enabled magento compiler. emptied log tables in db. Disabled logging.
Installed APC as an opcode cache using recommended settings Enabled caching and compression in apache.
Am using Argento theme.
What else can I do?
Was looking at varnish and redis but not sure if these are appropariate for a site with small catalogue and seems like there must be other simpler things I can do.
How can I debug where the problem is, page speed insights says slow server response and I get only 52 on the page speed insights score.
Any help on how to debug this gratefully received.
Paul
UPDATE: Testing page speed insights over time it seems there is a high variability over weeks as to what score is achieved. I'm wondering if that means it is down to the server rather than magento site alone. Anyone?