The recent Bun 1.2 release provides a JavaScript runtime and toolkit that simplifies transitioning from Node.js, particularly for projects using Typescript. In a test migration, it took less than 30 minutes to adapt an internal tool, mainly requiring a change from Jest to Bun's built-in Testrunner. The process involved downloading Bun, initializing a new project, and adding necessary dependencies. While there was no significant speed difference in running the tool, Bun dramatically improved dependency installation speed, resulting in a 58% reduction in CI pipeline execution.
According to their docs, Bun is "an all-in-one JavaScript runtime & toolkit designed for speed, complete with a bundler, test runner, and Node.js-compatible package manager".
I had no issues with Bun. Transitioning from Node.js was easy, and Bun makes the transition process easy with their promise that Bun aims for 100% Node.js compatibility.
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