thanks Guido

I will keep working with it. 

I am not able to debug between socket and asyncio-read-udp.

There is no bottleneck on cpu/memory or network card.

I cannot write debug with this heavy udp load.

if I decrease the UDP per second then this problem go away. 

I know when it will start dropping and i never got any drop inside the network. ( tcpdump to validate it ).

I will send it to python-tulip

regards!
Valdemar