Bun vs. Deno vs. Node.js: which JavaScript runtime wins in 2026?
15 hours ago
- #javascript
- #benchmark
- #runtimes
- Node.js is the safe default for maximum ecosystem compatibility, especially for production projects and teams with existing Node experience.
- Bun offers the fastest startup, installs, and test runner, making it ideal for new projects prioritizing developer experience and serverless deployments.
- Deno provides the most secure-by-default sandboxing, best TypeScript-first experience, and, as of version 2.9, leads in raw HTTP throughput.
- All three runtimes are production-ready in 2026, with choice depending on specific constraints like security, speed, or compatibility.
- Benchmarks show Deno leads in HTTP throughput (133,093 req/s), Bun is fastest in cold start (11 ms), and Bun's install times are significantly faster with warm caches.
- Architectural differences: Node.js uses V8 and libuv, Deno uses V8 with a Rust host, and Bun uses JavaScriptCore with a Zig runtime.
- TypeScript support varies: Deno offers full runtime type-checking, Bun and Node.js strip types but require external tools for checking.
- Ecosystem compatibility: Node.js has near-universal npm support, Bun achieves ~95% compatibility, and Deno allows npm imports via specifiers.
- Built-in tooling: Deno has the most comprehensive set, Bun excels in speed for specific tasks, and Node.js relies more on external tools.
- Recommendations: Choose Node.js for compatibility and hiring, Bun for speed and DX, Deno for security and TypeScript-first workflows.