Migrating a TypeScript app from Node.js to Bun

The text discusses the author's experience transitioning a TypeScript application from the Node.js runtime to Bun, an alternative JavaScript runtime, with an emphasis on npm compatibility. The author outlines the process of installing Bun, porting dependencies, and addressing issues related to runtime types and module resolution, as well as adapting the code to Bun's asynchronous behavior. Despite encountering some challenges, such as the lack of a direct Bun equivalent for certain Node.js APIs and the need to adjust the use of top-level await, the author successfully runs the app both locally and on GitHub Actions. Performance testing reveals that Bun executes the app significantly faster than ts-node, with approximately 50% faster end-to-end processing and a much quicker startup time. Overall, the author expresses satisfaction with Bun's performance and plans to continue exploring its potential for future projects.