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Backend2026-05-17

Bun

Also known as: Bun / バン

A fast all-in-one JavaScript runtime written in Zig. It bundles a runtime, package manager, bundler, and test runner in one binary, with Node.js-compatible APIs and significantly faster startup and throughput.


Overview

Bun uses the JavaScriptCore engine to achieve faster cold starts than Node.js. Its built-in package manager, bundler, and test runner eliminate the need for separate tooling. TypeScript and JSX run natively without transpilation.

Hono Integration

The Hono framework treats Bun as a first-class runtime, letting you replicate edge-level latency locally. See Hono + Inertia + React deployment guide for a practical setup.

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