You missed the "streaming" part. Being able to allocate only a few KB to ingest any JSON is a killer feature. There is a valid reason to reinvent the wheel :

You missed the "streaming" part. Being able to allocate only a few KB to ingest any JSON is a killer feature. There is a valid reason to reinvent the wheel : in my case I had to do something similar in C99 for a SaaS federated search engine to have the lowest memory footprint possible.