DarkRP Setting "rp_advertisements" creates lag?

Hey folks! I got a question for you…

I’ve got the SVN version of DarkRP installed on my server and I recently noticed that every time a help message (rp_advertisements) appears, a pretty big lag spike comes as well!
Is this something that happens to everyone or am I the only one who gets it? Can someone help me removing this lag spike? I have searched for it everywhere but I can’t find anything.

All help is greatly appreciated! Thanks.

/ LiX

EDIT: Also, it doesn’t matter if I change rp_advertisements to 0, the lag spike still appears at the same time as the help message would appear!