Bun in 2026: Is It Time to Replace Node.js?

Bun in 2026: Is It Time to Replace Node.js? Bun launched in 2022 with benchmarks that seemed too good to be true: 3x faster than Node.js, 5x faster package installs, everything built-in. In 2026, after four years of development, it's time to give an honest answer: should you actually switch? What Is Bun? Bun is a JavaScript runtime, package manager, bundler, and test runner — all in one. Built from scratch in Zig (a systems programming language), using JavaScriptCore (the engine that powers Safari) instead of V8. Here's the single executable that replaces: node (runtime) npm / pnpm / yarn (package manager) webpack / esbuild / rollup (bundler) jest / vitest (test runner) ts-node / tsx (TypeScript execution) Real Benchmark Numbers in 2026 I ran these on a modern Linux server (not cherry-picked): Package Installation # Installing a fresh Next.js project time npm install # 31.2s time yarn install # 24.8s time pnpm install # 18.4s time bun install # 3.1s ← 10x faster Bun caches aggressively