1. https://github.com/ezpkg/iter.json: last year, using go iterator, the core parsing code [1a] is around 200 lines
1a. https://github.com/ezpkg/ezpkg/blob/main/iter.json/parser.go
2. https://github.com/iOliverNguyen/ujson: 4 years ago, using callback, around 400 lines