Author here, we have adopted this approach as a fast path to box64: https://github.com/ptitSeb/box64/pull/1763, thank you very much!

Note these benchmarks only applies to pure emulation. For "real" programs, it will likely need some shared libraries. Box64 wraps some commonly used shared libraries, and function calls to these libraries will be forwarded to the corresponding native library for execution, which is almost native speed.