Sonic Boom is a tiny, ultra‑fast Node.js writable stream optimized for UTF‑8 output to files or file descriptors, offering 2–3× the throughput of the built‑in `fs.createWriteStream`. It provides a simple API with back‑pressure, optional synchronous writes, log‑rotation support, and configurable buffering, making it ideal for high‑performance logging or any application that needs to bulk‑write UTF‑8 data efficiently.