I am disappointed that the encoder/decoder state can't be 'checkpointed'.<p>Imagine this usecase:. We're sending tiny messages over a tiny link. Every byte matters - if we can cut a 10 byte message down to 7, that will really help. So we compress each message as part of a stream, flushing at message boundaries.<p>However, sometimes messages are lost on the route, and we might decide not to retransmit them - there might now be more relevant stuff to say over the link.<p>Zstandard has to way to 'undo' a compression operation on a data stream.