Forums mIRC Help mIRC switchbar and cpu usage

What are the sort of behaviors or activities performed by the switchbar that tend to consume CPU? I'm not encountering this, and I do quite a bit of hanky panky with hiding/showing switchbar icons based on channel activity or lack there of.

http://hawkee.com/snippet/17934/ -- r_idlehide.mrc - Automatically Hide Idle Channels from the Switchbar.