High-performance TCP/IP networking for bhyve VMs using netmap passthrough

Modern cloud computing technologies require powerful virtualization tools. The bhyve hypervisor is currently missing an high performance Virtual Machine networking solution, comparable to vhost-net on Linux and QEMU-KVM. Using netmap passthrough, I would like to extend the bhyve hypervisor to support high speed TCP/UDP traffic (~20 Gbps per VM interface) .