FWIW, here is a fairly minimal example[0] of broadcasting over websockets reusing the same buffer. I'm not very familiar with vert.x(not a netty expert either)

FWIW, here is a fairly minimal example[0] of broadcasting over websockets reusing the same buffer. I'm not very familiar with vert.x(not a netty expert either), but I think the author of that article is ascribing blame to the wrong place. [0]: https://github.com/juggernaut/netty-websocket-broadcast-example/blob/master/src/main/java/co/leanjava/pubsub/WebSocketMessageHandler.java https://github.com/juggernaut/netty-websocket-broadcast-exam...