Why I built a dependency-free C23 JSON-to-XML converter, how it compares with json2xml's Rust-accelerated Python pipeline, and the engineering work behind it.

How I used Python and native Rust flamegraphs, worst-case tests, and staged releases to make json2xml 31% faster and json2xml-rs another 6% faster.

How json2xml 6.2.0 and json2xml-rs 0.3.0 reduce peak serializer memory usage for large JSON to XML conversions.

A productive day porting json2xml to Go and Zig, adding CLI support to the Python version, and benchmarking all three implementations.