Added comment about perf concerns
Added comment about perf concerns

zen/solar,zen/solar,loles/solar,pigmej/solar,openstack/solar,loles/solar,pigmej/solar,pigmej/solar,loles/solar,Mirantis/solar,openstack/solar,loles/solar,openstack/solar,zen/solar,Mirantis/solar,Mirantis/solar,zen/solar,Mirantis/solar