Bun 1.x in Production: A Complete Migration Guide from Node.js

This guide provides a practical migration path from Node.js to Bun 1.x for production environments, covering HTTP servers, file I/O, SQLite, testing, package management, and CI/CD with real code comparisons and benchmarks. Bun offers 4-5x faster startup, 3-4x higher HTTP throughput, 10-30x faster package installs, and native TypeScript support, though it still lacks full native addon support and worker_threads parity.