Enable cache
- Go to Administer > Site configuration > Performance
- Set Caching mode to Normal or Agressive
- Set Block cache to Enabled
- Save your settings
In regards to page compression, you will find on admin/settings/performance a description that looks like By default, Drupal compresses the pages it caches in order to save bandwidth and improve download times. This option should be disabled when using a webserver that performs compression. To find out whether your server already performs compression have a peek at /etc/httpd/conf/httpd.conf (CentOS/Redhat) or /etc/apache2/mods-enabled (Debian/Ubuntu) to find out if the module mod_deflate is called. If so, turn off page compression.
You're done!
Useful resources:
by jchatard
