From http://billxinli.com/2011/12/14/fixing-skypes-high-cpu-usage/
I brought home a new MacBookPro the other day (well yesterday) It had nothing but a clean install of 10.7.2, I installed Skype, and did a bit of video calling, to my surprise it was using over 300% of the CPU. Unless if it is solving the cure to cancer, that should not happen.
I tried multiple versions of the software, and they were all taking up the same amount of CPU cycles.
The
I realized that Skype uses peer to peer with supernode peers for call routing. I have a Rogers extreme connection, without a firewall, and my IP for the mac placed in the DMZ.
