I was wondering, do the kafka consumer shell scripts (high and low level ones) and kafkacat do any pre-processing of the topic messages before outputting to stdout or does it just output "as is" in the format the message originally came in through kafka from the producer?
Meaning pretty printed JSON produced is consumed as pretty printed JSON, line delimited JSON blobs (not pretty printed) is consumed the same way. I'm asking this as I notice some topics I'm consuming with the shell scripts (and kafkacat) are pretty printed and some not. So just wanted to confirm this while also checking with the developers of the topic producers on whether they are pretty printing on their end or not. In general, I'm assuming as best practice, it's better not to pretty print the JSON as a producer to save on message size for network transmission and file storage by kafka, since those extra newlines and spaces/tabs add up over time?
