You might want to take a look at https://github.com/ohler55/ojg https://github.com/ohler55/ojg. It takes a different approach with a single pass parser. There a

You might want to take a look at https://github.com/ohler55/ojg https://github.com/ohler55/ojg. It takes a different approach with a single pass parser. There are some performance benchmarks included on the README.md landing page.