Rudder

The configuration to gzip to the browser the json & al exists only within the /opt/rudder/etc/rudder-apache-relay-ssl.conf file, so when we have a custom certificate and splitted vhosts, the vhsots serving for the web interface ( /opt/rudder/etc/rudder-apache-webapp-ssl.conf ) does not contains the

<IfModule mod_deflate.c>
<IfModule mod_filter.c>
  # Enable gzip encoding on textual resources
  AddOutputFilterByType DEFLATE text/plain text/html text/xml text/javascript text/css
  AddOutputFilterByType DEFLATE application/xml application/xhtml+xml application/rss+xml image/svg+xml
  AddOutputFilterByType DEFLATE application/json application/javascript application/x-javascript
</IfModule>
</IfModule>

entries, and nothing is compressed
It makes the web interface much slower than it should (resulting even in timeout)

adding the entries in /opt/rudder/etc/rudder-apache-webapp-ssl.conf solves the issues