Need help optimizing a site for speed and response time In my Drupal 6 site (fairly busy about 200 anonymous users on average at at time) I have the following setup to speed up the site.


Caching Mode - normal
Optimize JavaScript files
Gzip enabled via .htaccess
Cloudflare - normal setting
Disabled database logging


Can I add memcached or Varnish into this setup? Which one will work better for this site? Should I even care about Varnish and memcached in this setup?
You can use both as per my knowledge.

For Drupal generally, Varnish works for unauthenticated users traffic and memcached will cache authenticated users traffic.

Memcache saves your DB from doing a lot of read work, Varnish saves your dynamic web server from CPU load by making you generate pages less frequently.

But in your case I think Varnish is better option.