Hyperliquid: Python ML → Rust Layer

Write your trading strategy in Python. Let Rust execute it.

You keep pandas, scikit-learn, XGBoost and PyTorch. You never rewrite a model in Rust. A Rust core takes your strategy's decisions and turns them into live orders — quickly, predictably, and identically every time.

Codename Axon: the wire that carries a signal from the Python brain to the Rust muscle.

The idea in one picture

flowchart LR
    subgraph PY ["🐍 PYTHON — the brain"]
        direction TB
        A["Market dataarrives"] --> B["Computefeatures"]
        B --> C["Run themodel"]
        C --> D["Decide:hold 0.5 BTC"]
    end

    subgraph RS ["🦀 RUST — the muscle"]
        direction TB
        E["Read thedecision"] --> F["Check therisk limits"]
        F --> G["Build theorder"]
        G --> H["Send it tothe exchange"]
    end

    V(("🏦Hyperliquid"))

    D -.->|"shared memory70 nanoseconds"| E
    H -->|"0.2 – 0.9 seconds"| V

    style PY fill:#e8f0fe,stroke:#4285f4,stroke-width:2px,color:#111
    style RS fill:#fdecea,stroke:#e8710a,stroke-width:2px,color:#111
    style V fill:#e6f4ea,stroke:#34a853,stroke-width:2px,color:#111

Python says what it wants. Rust works out how to get it, and deals with the exchange saying no. Nothing is shared between them that either side can corrupt — decisions cross as fixed-size records in a lock-free queue, one writer, one reader.

Where the time actually goes

This is the part almost everyone gets wrong. Measured on real hardware, not quoted from a blog:

 Python → Rust handoff        70 ns   ▏
 Rust core wake-up cycle     366 µs   ▎
 Exchange round-trip     0.2 – 0.9 s  ████████████████████████████████████████
                                      └─ the exchange is >99.8% of the wait

Put it on a human scale. Suppose the Python→Rust handoff took 1 second:

The language boundary is not the bottleneck. It was never going to be. Making it ten times faster would change nothing you could measure.

So why use Rust at all?

Because the point isn't speed. It's never stalling.

An exchange order book is **first-come, firs