Why vbseo is server intesive ?

[pr0team.net]

Hello,

I have question to vbseo team,
Why vbseo is server intesive ?

example :

server# uptime
 8:46PM  up 10 hrs, 2 users, load averages: 3.63, 2.66, 2.57
server# ^ before vbseo
server# uptime
 8:47PM  up 10:01, 2 users, load averages: 8.60, 4.03, 3.08
server# ^ after vbseo 1 min
server# uptime
 8:48PM  up 10:02, 2 users, load averages: 15.77, 6.68, 4.11
server# ^ after 2 mins i can't use  vbseo!
server# uptime
 8:49PM  up 10:03, 2 users, load averages: 18.11, 8.17, 4.75
server# ^ i turn off

Tech specs :
Dual xeon 2.6, 2 gb ram, freebsd
(Lighttpd, xcache, php 4.4.4 )
phpinfo : http://ajo.pl/a.php

The load make vbseo connections! not mysql queries!
why is bad ?
Anyone can help administators in my position ?
Any ideas ?

Wait for vbseo team comments.