The article discusses strategies for adding Rust incrementally into servers written in languages like JavaScript, Python, etc., to improve performance when bottlenecked by CPU. Tiers range from not using Rust to rewriting the entire server in Rust. The author benchmarks these strategies on a Node.js server with a QR code generation function. Surprisingly, implementing Rust as a CLI tool increased throughput by 76% and reduced response size. Transitioning the function to a Rust Wasm module doubled throughput compared to the baseline. Handwriting Wasm bindings for different languages was explained, showcasing the complexity and necessity of tools like wasm-bindgen. Overall, the article provides valuable insights into optimizing server performance with Rust.
https://github.com/pretzelhammer/rust-blog/blob/master/posts/rust-in-non-rust-servers.md