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Backend technology
Bundevelopment expertise.
A fast JavaScript runtime, bundler, test runner, and package manager all-in-one.
Category
Backend
Learning curve
Easy
Introduced
2022
Overview
Where Bun fits in a modern product.
Bun is a modern JavaScript runtime like Node.js but faster, with built-in bundler, test runner, and package manager. It's designed as a drop-in replacement that dramatically improves performance and developer experience.
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Package Manager
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Test Runner
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Bundler
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Node.js Compatible
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Web APIs
Product use cases
What teams build with Bun.
The technology is most valuable when its strengths match the product, team and operating context.
Web Servers
CLI Tools
Development Tooling
Scripting
Performance-Critical Apps
Engineering assessment
Strengths and trade-offs, considered together.
Technology selection should account for product requirements, team capability, ecosystem maturity and long-term ownership.
Strengths
- Exceptional performance
- All-in-one solution
- Node.js compatible
- Built-in tools
- Modern APIs
- Simplified workflow
Considerations
- Very new technology
- Incomplete Node compatibility
- Changing APIs
- Limited production testing
Getting started
Install Bun, replace node/npm commands, explore built-in tools, and benchmark against existing Node.js apps.
Best practices
Leverage built-in tools, test compatibility layers, monitor performance gains, contribute to ecosystem growth.
Ecosystem
Bun ecosystem includes frameworks like Elysia, growing npm compatibility, and expanding tool integrations.
Related technologies
Explore the surrounding ecosystem.
Compare adjacent frameworks, platforms and tools that commonly support similar product goals.