A practical 2026 comparison of Bun and Node.js covering HTTP throughput benchmarks (Bun hits ~120k req/s vs Node's ~45k), startup time (4x faster), and ecosystem compatibility (~95% for typical web apps). Includes a real migration walkthrough of a 3,000-line Express API completed in ~2 hours, a recommended Bun-native stack (Hono + Prisma), and clear guidance on when to switch vs. stick with Node.js.
Table of contents
What Is Bun?The Benchmark RealityEcosystem Compatibility in 2026When to Actually SwitchMigrating a Project: What It Actually Looks LikeThe Bun-Native StackConclusionSort: