The reports mentioned below have no particular practical value for web development because in real-life (modules installed, content created, users registrated etc) results are supposed to be completely different. That's why the given article is just an apt illustration of a profiler's real work ...
To demonstrate this I have installed 3 versions of CMF Drupal:
1) Drupal 6.20
2) Drupal 7.0
3) Pressflow 6.20.97
Then I launched the web server benchmark with the help of siege utility, thrice:
[email protected]:/# siege 'http://xhprof.mysite.com/d6/?enable_xhprof=time&namespace=d6' -d10 -r10 -c10 [email protected]:/# siege 'http://xhprof.mysite.com/d7/?enable_xhprof=time&namespace=d7' -d10 -r10 -c10 [email protected]:/# siege 'http://xhprof.mysite.com/pressflow/?enable_xhprof=time&namespace=pressflow' -d10 -r10 -c10
10 times of 10 compatible queries for each installation with interval of 1-10 sec in between.