Why Rust Beats Node.js for Web Services: Lessons from Building JustFax

JustFax Architecture

The service consists of two OS processes: a web server written with the Axum framework (built on Tokio, Hyper, and Tower) and a scheduler that continuously polls a SQLite database via rusqlite.

Benefits of Using Rust for Web Development

Memory Usage : The entire web app and its scheduled task run inside Docker with less than 30 MB of RAM, far outperforming a comparable Node.js setup.

Security : Rust’s strict compile‑time checks prevent many runtime errors such as unsafe deserialization, making applications more reliable.

Asynchronous Programming : Although async Rust is less mature than Node.js, its model works well and can be backed by threads when needed.

Type Safety : Rust’s robust type system eliminates common bugs like invalid UUID strings, providing strong guarantees during development.

Drawbacks and Challenges

Language Complexity : Rust’s steep learning curve, especially the borrow checker, can be daunting for newcomers.

Borrow Checker : Understanding ownership, lifetimes, and references is essential but adds difficulty.

Compilation Time : Initial builds can take over 10 minutes in CI, though caching and multi‑stage Docker builds can reduce this to around 3 minutes.

Ecosystem Size : While Rust has a vibrant community, its package ecosystem is smaller than Node.js or Python, and some libraries may be missing.

Conclusion

The author enjoys building web projects with Rust, noting its safety, low memory footprint, and ability to run on modest VPS resources without large cloud costs. Despite challenges, Rust offers a compelling alternative to Node.js for backend services.