This makes the serialization to be executed
lazily, using memory-optimised approach,
and being fast to recycle.

The biggest benefit comes from the fact that
storing full Hash of object serialization is expensive,
as it also often results in holding original
representations of objects.

This solves that, by making batch serialization,
that outputs exact raw JSON content to generated string.

JSON generator is optimised to have efficient string
appender, this makes use of that.