After a little bit of configuration, he did some testing (with ab2) on the following benchmarks:
- Drupal's built-in caching versus APC
- a PHP4 installation versus a PHP5 install
- Using a reverse proxy
- mod_php versus FastCGI
- Apache versus Lighttpd
In his conclusions, he notes that the slowest configuration for the install was the combination of PHP5 running as a module on Apache 2 without APC. The fastest - FastCGI on Lighttpd running the PHP4 version.