[CentOS] High CPU usage by lftp

Greetings,

I have written a script using lftp to mirror one directory from a ftp site.

I do not have access to the server except for being a humble user.

This is running on a fully updated Centos 5.3 box.

I am using whatever is provided by the repositories.

I noticed that lftp consumes almost all of cpu times

I found this while searching for a solution.

http://www.mail-archive.com/lftp%40uniyar.ac.ru/msg02101.html

Could it be this reason? if its not has anybody else observed what I have
described? What are the possible ways of getting around
.

I am using --parallel=10 in the mirror sub-command of lftp

TIA

Rajagopal