I’ve been working on finding out what works and what doesn’t concerning speed of Drupal 7 sites. For this I’ve made a module that pings admin/config page sevaral times and logs the results on screen. I’ve wrapped this module into a working Drupal 7 site with preinstalled modules to make the site emulate a real (big) one.
You can see current results here: http://hkirsman.github.io/drupal7_benchmark/
I would appreciate any comments/questions and it would be very helpful to see more benchmarks.