Node.js vs io.js: What are the differences?

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1. **Architecture**: Node.js follows a governance model with contributions managed by the Node.js Foundation, focusing on stability and long-term support. On the other hand, io.js is a community-driven fork of Node.js that aims to bring more frequent updates and faster integration of new language features.
2. **Module Versions**: Node.js uses a CommonJS module system where modules must be explicitly imported and exported, while io.js supports ECMAScript 6 modules, enabling a more modern approach to module management.
3. **Performance**: Node.js emphasizes stability and performance by optimizing for production use cases, while io.js focuses more on experimenting with cutting-edge features and potentially sacrificing stability for performance gains.
4. **API Compatibility**: Node.js is known for its stable API that remains consistent across versions, ensuring backward compatibility for existing applications. In contrast, io.js may introduce breaking changes more frequently to adopt newer JavaScript features or performance enhancements.
5. **Community Support**: Node.js has a larger and more mature community with extensive documentation, tutorials, and third-party libraries available, making it an ideal choice for enterprise applications. Io.js, being newer and more experimental, may have a smaller community and fewer resources available.
6. **Long-Term Support (LTS)**: Node.js offers LTS releases with a well-defined support schedule, providing businesses with a stable platform for their applications. Io.js, being more focused on rapid development, may lack the same level of LTS commitment, potentially leading to inconsistent support for older versions.

In Summary, Node.js and io.js differ in architecture, module versions, performance, API compatibility, community support, and long-term support approaches, catering to different development and use case requirements.