iperf result when vhost is enabled:
root@anfernee-XPS-8700:/home/anfernee/VM/images# iperf3 -c 192.168.122.41
Connecting to host 192.168.122.41, port 5201
[ 5] local 192.168.122.1 port 50716 connected to 192.168.122.41 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 4.72 GBytes 40.6 Gbits/sec 0 1.95 MBytes
[ 5] 1.00-2.00 sec 4.97 GBytes 42.7 Gbits/sec 0 2.64 MBytes