Now I kinda want to test it to see how it works if your application flushes lots of little packets <MTU. Some proxies will try to recombine the packets to make

Now I kinda want to test it to see how it works if your application flushes lots of little packets <MTU. Some proxies will try to recombine the packets to make the connection more efficient, some will just forward as-is. But this is super important behavior to be familiar with (and documented) for things like websockets.