Bun is a software that enhances the experience of working with TypeScript by providing speed and practicality for scripts, apps, tests, and tooling. Anthropic has acquired Bun, raising concerns about its future as a serious alternative to Node.js.

Bun has achieved a 100x speed increase by rewriting Git in the Zig programming language and integrating it into its runtime. This enhancement significantly improves performance for developers using Bun.