Efficient methods for printing JSON

[armanbilge]

@zarthross continuing our discussion from circe/circe#1855 (comment)

To bikeshed a bit, i was just imaging something of the signature def printToStream[F[_]](json: Json, cs: Charset): Stream[F, Byte] but we could go and do something like def printPipe[F[_]](cs: Charset): Pipe[F, Json, Byte] as well.

For your use case in Feral you would be able to then do printToStream(json).through(fs2.io.writeOutputStream(channel)) or something.

Reason I suggest a different printer implementation is I think having an FS2 native implementation would be able to suspend the encoding of the json better, and just overall work better with FS2 than trying to hack around Appendable

I agree that would certainly be a feature worth having. But unfortunately it doesn't address my use case. The problem with a printToStream(json).through(fs2.io.writeOutputStream(channel)) is that instead of printing the Json directly to the output stream, it goes through an intermediate representation of Chunk[Byte] which is exactly what I'm trying to avoid :)