It would only block if you did it synchronously. If I had to build an endpoint that generated ZIPs on the fly, I would explicitly build it to be asynchronous a

It would only block if you did it synchronously. If I had to build an endpoint that generated ZIPs on the fly, I would explicitly build it to be asynchronous and efficient as possible. The only issue is that you might want to attach a buffer somewhere that might dump to disk past a certain amount, if the source of your data can’t be “paused.”