I recently asked a question regarding Drupal performance and got some great replies.
This got me thinking, what is a reliable/meaningful way to benchmark Drupal?
It's easy to say "install APC, memchached & Varnish" or "install module x or y", but how can I quantify just how big of a performance gain I'm getting from each setup? Basically, a sure-fire way to compare setups and find bottlenecks to squeeze the most possible performance from a Drupal site. What is the best method to find out?
Targetting Drupal 6.