"Here are some simple settings that any Moodle administrator can change from the Site Administration menu that will help to improve his/her Moodle site's performance."
2. How to load test your Moodle server using Loadstorm
"Using this step by step ‘how-to’, you will be able to test how well your Moodle installation would be able to cope with a certain amount of users, using the loadstorm.com service."
(Found in "Some interesting blog posts that I have read recently"
http://www.iteachwithmoodle.com/?s=Oktobertest. Highly informative.
Glad you found it hepful. I have ran the same tests against Moodle 2.4 beta - results at http://www.iteachwithmoodle.com/2012/11/17/moodle-2-4-beta-performance-test-comparison-with-moodle-2-3/
Spoiler: it breaks your theory of Moodle following Moore's law