Perfomance issue with many handled connection

[CartierPierre]

Hi, I'm investigate about some performance issue with many simultaneous connected client. The CPU usage is high after 4 clients.
The server is on a single thread and switch to other thread to handle the tcp connection, but the main thread keeps the connection open as bridge.
So I when to the code and I sa something quite strange.

simple-websocket-server/SimpleWebSocketServer/SimpleWebSocketServer.py

Line 697 in a6ddef7

self.serveonce()

But in serve_once() there is a lot of loop to reinitiatilse the connections for each while loop. Is there something to improve here ?

I can post my server configuration if needed