HigherOrderCO/HVM1 ? reverse-engineered prompt

Build me a Rust project for a tiny functional language runtime that can run simple example programs and show that it can use multiple CPU cores automatically.

I want it to feel like a research prototype for a fast, lazy, no garbage collection runtime, with a few working examples like sorting and math, plus a way to run benchmarks and compare results. Please make the project easy to build and run from the command line, and include clear setup instructions so I can try the examples without digging through the code too much.

If there are parts that are tricky or depend on newer docs, look up the current best approach online and keep the implementation practical. I mostly care that the runtime works, the examples run, and the code is organized well enough that I can understand and extend it later.