Thanks, that is very interesting.
Still, that mostly confirms my experience: to achieve this level of performance, you need to do optimizations on a lower level, and this is not really achievable with docker out of the box (plain Linux host with usual Docker runtime).
Underneath, we use specialized VMs (unikernels), a custom controller and load balancer, as well as a number of perf tweaks to achieve this. But it's (now) certainly possible.