> See my comment here: https://news.ycombinator.com/item?id=41829905

Your comment isn't equivalent to the original code.

Your one liner is doing this: `process.stdout.write('')`

Jitl's example is doing this: `new Promise(resolve => stream.write("", resolve))`

He's passing in a promise resolver as the callback to stream.write (this is basically a `util.promisify` version of the writable.write chunk callback). If the data is written in order (which it should be), then I don't see how the `stream.write` promise could resolve before prior data is flushed. The documentation says: "The writable.write() method writes some data to the stream, and calls the supplied callback once the data has been fully handled". [1]

[1] https://nodejs.org/api/stream.html#writablewritechunk-encodi...