tc_experiment.sh

# Restart haproxy every 100ms
while [ 1 ]; do 
  sudo nl-qdisc-add --dev=lo --parent=1:4 --id=40: --update plug --buffer &> /dev/null
  ./haproxy -f /tmp/haproxy.cfg -p /tmp/haproxy.pid -sf $(cat /tmp/haproxy.pid)
  sudo nl-qdisc-add --dev=lo --parent=1:4 --id=40: --update plug--release-indefinite &> /dev/null
  sleep 0.100
done

tc_result

$ ab -c 10 -n 1000000 169.254.255.254:16000/
Benchmarking 169.254.255.254 (be patient)
...
Complete requests:      1000000
Failed requests:        0
...
  50%      2
  95%      2
  99%      8
 100%     29 (longest request)