Thanks, but I am not using if_bridge. I am creating a netgraph bridge[0] which is connected to the host via a netgraph eiface. Then on the host, the packet passes to my real physical interface because I have gateway_enable and I have pf perform NAT[1]. It looks like that blog post connected the netgraph bridge directly to the external interface, so my guess is my slowdown is from either pf performing NAT or the packet forwarding from gateway_enable.
