Research Brief Pack — Topic + Audience → 1–2 Page Brief

I have prepared a research brief comparing Rust and C++ for high-frequency trading (HFT), focusing on memory safety, performance overhead, and ecosystem maturity.

Research brief: Use of Rust for high-frequency trading systems

Audience: CTO of a boutique hedge fund
Goal: Decide if we should migrate from C++ to Rust for our 2025 core engine
Geography / horizon: geo not specified · 2025
Depth: standard
Generated: 2024-05-22 · Draft for human verification — not advice

1. Executive snapshot

Rust presents a compelling alternative to C++ by offering memory safety without a garbage collector, potentially reducing "segmentation fault" related downtime. While execution speed is comparable, the primary hurdle is the lack of specialized HFT libraries and the significant cost of retraining a senior C++ team. The decision hinges on whether long-term stability outweighs the immediate migration risk and talent scarcity.

2. Key points

KP1 — Performance Parity: Benchmarks show Rust's Zero-Cost Abstractions match C++ in most computational tasks. Confidence: high

• KP2 — Memory Safety: Ownership model eliminates common C++ vulnerabilities like use-after-free. Confidence: high

KP3 — Ecosystem Gap: Lack of mature, low-latency market data connectors compared to C++'s 30-year lead. Confidence: medium

KP4 — Compile Times: Significantly slower than C++, which may impact rapid iterative deployment cycles. Confidence: high

KP5 — Talent Pool: High-calibre Rust developers are available but often lack deep market-microstructure experience. Confidence: medium

3. Implications for CTO

• Consider a hybrid approach: keep the core matching engine in C++ while building new risk management modules in Rust.
• Budget for a longer onboarding period; even senior C++ devs face a learning curve with the Rust borrow checker.
• Evaluate the cost of building internal wrappers for proprietary C++ HFT libraries.

4. Risks and watch-outs

5. Open questions

1. Perform a side-by-side latency benchmark of a specific order-routing logic in both languages.
2. Audit existing vendor APIs to see if Rust bindings are officially supported.
3. Review current C++ technical debt to quantify the "safety" benefit of a rewrite.

6. Source placeholders

1. [SOURCE: Comparative analysis of Rust vs C++ in low-latency systems — URL TBD]
2. [SOURCE: State of the Rust Ecosystem for Finance 2024 report — URL TBD]

7. Suggested next step

Conduct a two-week "spike" project to rewrite a non-critical market data parser in Rust to measure developer velocity and performance.

Next steps

• Verify the placeholder sources against recent industry whitepapers.
• Assign a senior engineer to run the suggested two-week spike project.