[wtarreau]

The default UDP buffers of 212kB are indeed a big problem for every client at the moment. You can optimize your server as you want, all your clients will experience losses if they pause for half a millisecond to redraw a tab or update an image, just because the UDP buffers can only store so few packets. That's among the things that must urgently change if we want UDP so start to work well on end-user devices.