Most json packages dictate a data structure that corresponds to json values.
To serialize other values to json, then that value must be marshalled into the
This library avoids this marshalling step, and is thus potentially more
efficient when serializing arbitrary data structures. Unfortunately
json-builder cannot yet read or process json data, and it's not clear to me yet
how pull a similar kind of trick to avoid unnecessary data structures when
parsing json data into arbitrary data types.