Bun vs Node.js 2026: Should You Switch Runtimes?

Bun has been production-ready since v1.0, and in 2026 it's no longer just a curiosity — it's a genuine alternative to Node.js for many workloads. So should you switch? My take: Bun for performance-sensitive services and new greenfield projects, Node.js for anything with deep ecosystem dependencies or when stability matters most. At a Glance Feature Bun Node.js Engine JavaScriptCore (Safari) V8 (Chrome) Speed 2-4x faster startup Baseline HTTP throughput ~3x requests/sec Baseline TypeScript Native (no transpile) Needs ts-node/tsx JSX Built-in Needs Babel/esbuild Package manager Built-in (bun install) npm/yarn/pnpm Test runner Built-in (bun test) Needs Jest/Vitest Bundler Built-in (bun build) Needs webpack/esbuild Stability Young, improving Extremely mature Ecosystem Node-compatible Massive Speed: Bun Is Genuinely Faster Bun's speed advantage is real and measurable: # Startup time node -e "console.log('hi')" : ~40ms bun -e "console.log('hi')" : ~6ms # Install 100 packages from scratch npm