# Show HN: Firenook – Firebase emulators in Rust: 40× faster writes, 10× less RAM

- HackerByte page: <https://hackerbyte.net/en/stories/a-new-developer-tool-written-in-rust-that-significantly-improves-the-performance-50378643>
- Original source: <https://firenook.dev/>
- Hacker News discussion: <https://news.ycombinator.com/item?id=50378643>
- Submitted to Hacker News: 2026-11-05T13:07:29.000Z

A new developer tool written in Rust that significantly improves the performance of Firebase emulators.

## AI-generated summary

Firenook is a new open\-source project that provides drop\-in replacements for Firebase emulators, written in Rust. It claims to offer significant performance improvements, including 40x faster writes and 10x less memory usage compared to the official Firebase emulators. Firenook also supports data persistence across restarts and requires no Java installation, making it a more streamlined development experience.

## Key points

- Firenook offers a faster alternative to official Firebase emulators.
- Achieves 40x faster writes and 10x less memory usage.
- Data persists across restarts, eliminating import/export delays.
- Written in Rust, requires no Java installation.
- Supports Firestore, Auth, Storage, Functions, Pub/Sub, Tasks, Eventarc, and Extensions.