A non-online/non-streaming parser can parse [0][1] in an online/streaming way by first parsing one text ([0]) then the next ([1]), whereas it has to parse all o

A non-online/non-streaming parser can parse [0][1] in an online/streaming way by first parsing one text ([0]) then the next ([1]), whereas it has to parse all of [[0],[1]] to produce a result. Similarly on the encoding side. Concatenated JSON is ambiguous, so you need to put some whitespace between any JSON texts where both aren't arrays or objects. This is a widely used technique.