Module builder 

Functions

build_extension

cargo_check_generated

Run cargo check on the generated crate to catch translation errors early. Returns Ok(()) if the check passes, or an error with the compiler output. This is a fast-fail step: it does NOT require maturin or a Python environment.

run_benchmark

Run a Python timing harness comparing the original Python function against the generated Rust extension. Prints a speedup table to stdout.