Thank you for sharing this benchmark, and the library. I was expecting ideal Go performance to approach that of Java and C#/.NET for large files, which last time I checked (a while ago) was about half the throughput of C code using libxml2. Beating libxml2 by a significant margin is very impressive.

Provided a similar implementation is ported to C and C#, it would have ended up performing faster - Go compiler is relatively weak, and Go the language lacks certain crucial performance primitives that C, C++ and C# (and Rust) have.