borayeris on "Wordpress MU - Creating a site takes ages"

I have 2 dedicated servers. I have Wordpress MU on both. When I try to create a site

1. WP MU 1 on server 1 does it in 3-5 seconds
2. WP MU 2 on server 2 does it in 45-50 seconds

What can cause this delay? How can I debug PHP and MySQL?

PS: Both WP MU are test installations. No plugins activated. Both OS are CentOS, Httpd is Apache and DB is MySQL.