I have set up local mining with 6x Antminer U1 on bitcoin, hoping for the lottery ticket to come out.

bitcoind + eloipoo.py - works fine, and I get diff 16 work to do.
One proboem, eloipool.py seems to eat 100% CPU on one core all the time. Can I do something to lower the CPU usage ? I wonder what it is doi9ng that eats so much CPU.