What are the main challenges when using Bun for server-side rendering

Compatibility Issues

- Framework Limitations: Some frameworks, like Angular, have specific dependencies (e.g., Zone.js) that may not be fully compatible with Bun. This can lead to issues during SSR implementation, as certain features might not function as expected without additional workarounds or modifications[3][4].

- Integration Complexity: While Bun supports integration with various libraries and frameworks, achieving seamless compatibility can require extra effort. For instance, developers have reported difficulties in getting Angular's SSR to work properly with Bun without significant adjustments to the codebase[2][3].

Performance Variability

- Benchmarking Results: Although Bun is marketed as being significantly faster than Node.js, some users have found that the performance gains are not always as pronounced in real-world applications. For example, one developer noted that despite using Bun, the majority of the rendering time was still spent executing Angular JavaScript, which limited the expected speed improvements[2][3].

Limited Documentation and Community Support

- Growing Ecosystem: As a relatively new framework, Bun's documentation and community support are still developing. This can make it challenging for developers to find resources or troubleshoot issues effectively compared to more established frameworks like Node.js or Express[1][5].

Experimental Features

- Beta Status: Many of Bun's features are still in beta or experimental stages. This means that while they may offer exciting capabilities (like server components), they might also come with bugs or instability that could affect production applications[4][5].

Tooling and Ecosystem Maturity

- Ecosystem Integration: Bun's ecosystem is not as mature as those of other JavaScript runtimes. While it offers a unified plugin API and supports various file types, the availability of third-party tools and libraries may be limited compared to more established environments like Node.js[1][6].

In summary, while Bun offers promising features for server-side rendering, developers should carefully consider these challenges related to compatibility, performance variability, documentation, experimental features, and ecosystem maturity before adopting it for production use.