This is approaching the size of the Rust compiler itself; except that BunJs is mostly a JavaScript interpreter wrapper + a reimplementation of the NodeJS library (Rust STD wrapper).
I think BunJS is becoming the canary for software complexity management in the LLM era.
> they do it using either a parallel functional language or a parallel library in modern C++.
IMO this is a weakness not a strength.
The approach of Fleury (low level C, no lib), makes his articles a lot more valuable for understanding fundamentals.