Bun v1.2.17 is a significant update that fixes 50 issues, adds 24 new passing Node.js tests, and introduces powerful new features for developers.

Key Highlights:

• Ahead-of-Time HTML Bundling:
  You can now import .html files in server-side code and bundle them ahead of time using bun build. This eliminates runtime bundling overhead and allows creating a single executable for full-stack apps with --compile.

bun build ./src/server.ts --compile --outfile=my-app

• Bun Shell Reliability:
  Bun’s shell (Bun.$) no longer uses the native call stack, preventing stack overflow in complex scripts.
• Memory Optimization for Timers:
  setTimeout and setImmediate now use 8–15% less memory, improving performance in apps with many timers.
• bun:sqlite Enhancements:
  New properties declaredTypes and columnTypes help introspect schema and runtime column types.
• bun info Command:
  bun pm view is now bun info for easier package metadata lookup.
• Claude Integration:
  bun init generates CLAUDE.md when Claude CLI is detected, improving AI coding assistant context.
• Node.js Compatibility:
  • child_process.fork() now supports execArgv.
  • Added tls.getCACertificates().
  • fs.glob options are now optional.
  • Zstandard (zstd) compression in node:zlib.
  • Support for --unhandled-rejections flag.

Why It Matters:
This release makes Bun more production-ready, with better performance, developer tooling, and Node.js compatibility.