Bun vs Node.js in 2026: Should You Actually Migrate?

Bun emerged as a standout JavaScript runtime at the end of 2025, and some mid-sized teams are now using it in production in 2026.

Internal benchmarks show Bun is much faster than Node.js for installs, tests, scripts, and builds, but the advantage narrows for database-heavy servers.

The main migration risks are native modules, differences in package script behavior, and compatibility with observability and APM tooling.

Overall, Bun looks like a strong speed upgrade for developer tooling and some workloads, but a hybrid approach is likely safer for production migration.