I developed a Python JSON library, ssrJSON, built on the yyjson codebase and SIMD techniques. It can serve as a compatible replacement for most common JSON use cases, and benchmarks show it outperforms orjson, which advertises itself as the fastest. Compared with other Python JSON libraries, ssrJSON addresses UTF-8 cache related performance pitfalls, giving it a significant advantage when handling strings; technical details are available on my blog: https://en.chr.fan/2026/01/07/python-json/. In addition, for floating‑point handling ssrJSON uses the latest zmij algorithm.

I noticed that orjson has closed its issue tracker: https://news.ycombinator.com/item?id=47022606. If the community wishes to maintain a stable, high‑performance JSON parser, ssrJSON could be considered as an alternative.