Impact Score: 5/10
Bun v0.6.0
Source available โ automated, not human-reviewed
Component: bun ยท Channel: stable. Automated analysis, not a compatibility certification. How this works.
Analysis updated: 2026-11-01.
โก Executive Summary (TL;DR)
Bun bun-v0.6.0. Source highlight: **Read Bun v0.6.0's release notes on Bun's blog**
Who Does This Impact? (Role-Based Analysis)
๐ป Software Engineers & Devs
Check the source notes against the package and APIs you use before upgrading.
๐ Product & Engineering Leads
Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.
โ๏ธ DevOps & Security
Verify the target version, runtime requirements and rollback procedure in the official documentation.
โจ New Features & Capabilities (6)
- Add npm benchmark
- Add tests for `bun test` with preload scripts
- Add last modify field "mtime" for FileBlob (#1431)
- docs(cli/bunx): add notice
- docs: add a section on uninstalling bun
- feat(tls.Server) basic support (cert, key, rejectUnauthorized, requestCert, ca) #2412
โก Performance & Enhancements (3)
- Rewrite Developer Docs, Improve DX for new users, moving away from Devcontainer
- Improves Body.Value life cycle and Signal life cycle on server.zig
- bundler tests and improve `Bun.build` return type
๐ง Bug Fixes & Patches (6)
- Dylan/fix some failing tests
- fix: modules to have null prototype
- fix `deepEquals` with array holes and accessors
- fix: build warnings
- fix(fetch.proxy) fix proxy authentication
- fix(ws): export Server
๐ View Raw Release Notes (Original Developer Log)
**[Read Bun v0.6.0's release notes on Bun's blog](https://bun.sh/blog/bun-v0.6.0)**
To install:
```bash
curl https://bun.sh/install | bash
# or you can use npm
# npm install -g bun
```
To upgrade:
```bash
bun upgrade
```
<a href="https://bun.sh/blog/bun-v0.6.0">

</a>
## What's Changed
* Add npm benchmark by @colinhacks in https://github.com/oven-sh/bun/pull/2555
* Dylan/fix some failing tests by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2544
* Implement `import.meta.main` by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2556
* fix: modules to have null prototype by @privatenumber in https://github.com/oven-sh/bun/pull/2561
* fix `deepEquals` with array holes and accessors by @dylan-conway in https://github.com/oven-sh/bun/pull/2557
* In Documentation, move --watch before the script name by @Lawlzer in https://github.com/oven-sh/bun/pull/2569
* fix: build warnings by @privatenumber in https://github.com/oven-sh/bun/pull/2562
* fix(fetch.proxy) fix proxy authentication by @cirospaciari in https://github.com/oven-sh/bun/pull/2554
* Add tests for `bun test` with preload scripts by @jakeboone02 in https://github.com/oven-sh/bun/pull/2566
* Update `typecheck` by @colinhacks in https://github.com/oven-sh/bun/pull/2572
* bun-types: infer strict `Subprocess` from `Bun.spawn()` options by @paperdave in https://github.com/oven-sh/bun/pull/1501
* docs(CONTRIBUTING): reference development guide by @privatenumber in https://github.com/oven-sh/bun/pull/2576
* fix(ws): export Server by @privatenumber in https://github.com/oven-sh/bun/pull/2575
* move resolve tests to another process by @dylan-conway in https://github.com/oven-sh/bun/pull/2578
* bun-types: infer strict `Subprocess` from `Bun.spawn()` options, part 2 by @paperdave in https://github.com/oven-sh/bun/pull/2573
* Add last modify field "mtime" for FileBlob (#1431) by @zhongweiy in https://github.com/oven-sh/bun/pull/2491
* Fix `toEqual` when the second array has extra array holes by @dylan-conway in https://github.com/oven-sh/bun/pull/2580
* docs(cli/bunx): add notice by @xHyroM in https://github.com/oven-sh/bun/pull/2574
* docs: add a section on uninstalling bun by @paperdave in https://github.com/oven-sh/bun/pull/2560
* fix: export `constants` from `fs/promises` by @paperdave in https://github.com/oven-sh/bun/pull/2567
* feat(tls.Server) basic support (cert, key, rejectUnauthorized, requestCert, ca) #2412 by @cirospaciari in https://github.com/oven-sh/bun/pull/2552
* `FileBlob` -> `BunFile`, add `BunFile.lastModified` by @colinhacks in https://github.com/oven-sh/bun/pull/2581
* chore(prettier): simplify glob and enable cache by @privatenumber in https://github.com/oven-sh/bun/pull/2589
* Add TSConfig object type to TranspilerOptions interface by @jakeboone02 in https://github.com/oven-sh/bun/pull/2545
* Bun gets a new bundler by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2312
* Rewrite Developer Docs, Improve DX for new users, moving away from Devcontainer by @paperdave in https://github.com/oven-sh/bun/pull/2588
* Fix callout tag on development docs by @paperdave in https://github.com/oven-sh/bun/pull/2595
* Update TypeScript parsing to 5.0 by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2593
* Fixes #2594 by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2600
* Implement TOML & JSON support in Bun's new bundler by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2609
* Fix symbol renaming bug by @dylan-conway in https://github.com/oven-sh/bun/pull/2613
* fix(sockets) always safe deinit socket context by @cirospaciari in https://github.com/oven-sh/bun/pull/2611
* docs: remove dev container section by @privatenumber in https://github.com/oven-sh/bun/pull/2610
* Update development.md by @rmorey in https://github.com/oven-sh/bun/pull/2625
* continue refining bundler tests 1 by @paperdave in https://github.com/oven-sh/bun/pull/2623
* fix string escaping by @dylan-conway in https://github.com/oven-sh/bun/pull/2639
* fix(fs): remove `promises.readfile` by @privatenumber in https://github.com/oven-sh/bun/pull/2630
* bundler bug fixes by @dylan-conway in https://github.com/oven-sh/bun/pull/2637
* more bundler tests by @paperdave in https://github.com/oven-sh/bun/pull/2635
* fix(net) types and add more reliable tests by @cirospaciari in https://github.com/oven-sh/bun/pull/2621
* fix bundling many entry points by @dylan-conway in https://github.com/oven-sh/bun/pull/2640
* fix expectBundled precheck by @paperdave in https://github.com/oven-sh/bun/pull/2641
* import file path and fix disabled browser require by @dylan-conway in https://github.com/oven-sh/bun/pull/2642
* Upgrade WebKit by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2643
* Fix typo in development.md by @marktani in https://github.com/oven-sh/bun/pull/2647
* fix(server) fixes UAF of uWS headers by @cirospaciari in https://github.com/oven-sh/bun/pull/2648
* fix node-net-test hang by @cirospaciari in https://github.com/oven-sh/bun/pull/2649
* fix ambiguous import by @dylan-conway in https://github.com/oven-sh/bun/pull/2654
* Docs restructuring by @colinhacks in https://github.com/oven-sh/bun/pull/2638
* use a lazyily initialized stream for `node:crypto` `createHash` by @paperdave in https://github.com/oven-sh/bun/pull/2652
* Support `@jsx`, `@jsxRuntime`, `@jsxImportSource`, and `@jsxFragment` pragmas by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2655
* Upgrade Zig by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2656
* [nit] minor typo in tcp.md by @Kruithne in https://github.com/oven-sh/bun/pull/2657
* Support importing `.txt` files as strings by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2660
* toBeFalsy expect counter and test scope check by @will-richards-ii in https://github.com/oven-sh/bun/pull/2661
* more work on bundler tests by @paperdave in https://github.com/oven-sh/bun/pull/2667
* fix(cli): replace unknown unzip link with bun docs by @xHyroM in https://github.com/oven-sh/bun/pull/2669
* more bundler tests by @paperdave in https://github.com/oven-sh/bun/pull/2670
* Get axios working by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2673
* docs: fix code block by @simon04 in https://github.com/oven-sh/bun/pull/2662
* fix typescript decorators with index and number keys by @dylan-conway in https://github.com/oven-sh/bun/pull/2677
* fix parsing `with` keyword by @dylan-conway in https://github.com/oven-sh/bun/pull/2680
* fix package json exports visit by @dylan-conway in https://github.com/oven-sh/bun/pull/2687
* clarify file io docs by @paperdave in https://github.com/oven-sh/bun/pull/2689
* implement `node:events` in javascript by @paperdave in https://github.com/oven-sh/bun/pull/2604
* fix `make setup` by @alexlamsl in https://github.com/oven-sh/bun/pull/2693
* Fix typo in benchmarking docs by @flakey5 in https://github.com/oven-sh/bun/pull/2702
* Symbol minification by @dylan-conway in https://github.com/oven-sh/bun/pull/2695
* template string folding bug fix by @dylan-conway in https://github.com/oven-sh/bun/pull/2705
* chore(docs): add xcode runtime install to docs by @MaanuVazquez in https://github.com/oven-sh/bun/pull/2706
* Add `tsconfig.json` to `bun-types` by @colinhacks in https://github.com/oven-sh/bun/pull/2587
* Update `typescript.md` by @colinhacks in https://github.com/oven-sh/bun/pull/2590
* Make `Bun.build` more reliable by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2718
* Reduce friction for building with npm by @Plecra in https://github.com/oven-sh/bun/pull/2723
* Support plugins in `Bun.build` by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2720
* Continue bundler tests by @paperdave in https://github.com/oven-sh/bun/pull/2691
* [install] fix `bun add` on non-aliased dependency by @alexlamsl in https://github.com/oven-sh/bun/pull/2728
* fix `make setup` by @alexlamsl in https://github.com/oven-sh/bun/pull/2731
* Implement `onResolve` plugins in `Bun.build()`, support multiple onLoad and onResolve plugins by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2739
* bundler tests, testing plugins by @paperdave in https://github.com/oven-sh/bun/pull/2740
* Implement `file` loader in `Bun.build` by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2745
* Basic types for Bun.build by @colinhacks in https://github.com/oven-sh/bun/pull/2713
* Add bundler documentation by @colinhacks in https://github.com/oven-sh/bun/pull/2753
* docs hotfix by @paperdave in https://github.com/oven-sh/bun/pull/2755
* second hotfix to build docs by @paperdave in https://github.com/oven-sh/bun/pull/2756
* Fixes #2746 by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2748
* ensure `super()` is not merged with adjacent statements by @dylan-conway in https://github.com/oven-sh/bun/pull/2757
* Use Ninja to build mimalloc and gitignore test/bun.lockb by @silversquirl in https://github.com/oven-sh/bun/pull/2750
* bundler tests! by @paperdave in https://github.com/oven-sh/bun/pull/2741
* very slightly faster open() and writeFileSync() by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2759
* Remove extra word in docs/index.md by @beeburrt in https://github.com/oven-sh/bun/pull/2758
* fix: make node:crypto Hash.copy work correctly by @silversquirl in https://github.com/oven-sh/bun/pull/2761
* address unicode issue by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2763
* Bundler docs updates + support for `naming` string by @colinhacks in https://github.com/oven-sh/bun/pull/2767
* Improves Body.Value life cycle and Signal life cycle on server.zig by @cirospaciari in https://github.com/oven-sh/bun/pull/2752
* bundler tests: rest of default.test.ts and starting jsx tests by @paperdave in https://github.com/oven-sh/bun/pull/2765
* [install] handle repeated install of GitHub dependency correctly by @alexlamsl in https://github.com/oven-sh/bun/pull/2780
* [install] handle `devDependencies` of local folders by @alexlamsl in https://github.com/oven-sh/bun/pull/2781
* test default condition by @paperdave in https://github.com/oven-sh/bun/pull/2776
* Implement source maps by @dylan-conway in https://github.com/oven-sh/bun/pull/2770
* Bun Test matchers even/odd. Also, .toContains fix and truthy by @will-richards-ii in https://github.com/oven-sh/bun/pull/2754
* Add missing type for sqlite by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2764
* Add StricJS to ecosystem by @aquapi in https://github.com/oven-sh/bun/pull/2747
* Fix checking for dynamic exports by @dylan-conway in https://github.com/oven-sh/bun/pull/2792
* parse and visit catch body scope by @dylan-conway in https://github.com/oven-sh/bun/pull/2796
* Add initial ecosystem tests by @Electroid in https://github.com/oven-sh/bun/pull/2801
* fix source map line offsets by @dylan-conway in https://github.com/oven-sh/bun/pull/2791
* Start esbuild migration guide. More docs. by @colinhacks in https://github.com/oven-sh/bun/pull/2787
* Add missing JSON API to Web APIs page by @Kruithne in https://github.com/oven-sh/bun/pull/2799
* Add tracy by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2817
* added some improvements on server by @cirospaciari in https://github.com/oven-sh/bun/pull/2803
* Fix rebuilds in `Bun.build()` by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2824
* implement build api `define` and `loaders` by @paperdave in https://github.com/oven-sh/bun/pull/2805
* throw returned errors on `wrapWithHasContainer` by @paperdave in https://github.com/oven-sh/bun/pull/2832
* Fix tsconfig paths star only in the key by @dylan-conway in https://github.com/oven-sh/bun/pull/2825
* add `WebAssemblyInstance` and `WebAssemblyGCObject` js types by @dylan-conway in https://github.com/oven-sh/bun/pull/2835
* print space before label by @dylan-conway in https://github.com/oven-sh/bun/pull/2837
* resolve rope strings when folding by @dylan-conway in https://github.com/oven-sh/bun/pull/2838
* [install] operator on root package of workspaces by @alexlamsl in https://github.com/oven-sh/bun/pull/2834
* fix catch scope var declarations by @dylan-conway in https://github.com/oven-sh/bun/pull/2839
* `bun add` from root folder when call within workspaces by @alexlamsl in https://github.com/oven-sh/bun/pull/2841
* use member from parent scope when hoisting by @dylan-conway in https://github.com/oven-sh/bun/pull/2840
* fix(ws) fix closing WS with code and reason by @cirospaciari in https://github.com/oven-sh/bun/pull/2843
* fix(fetch) fix fetch inheritance by @cirospaciari in https://github.com/oven-sh/bun/pull/2842
* make sure vars can be hoisted in catch scope by @dylan-conway in https://github.com/oven-sh/bun/pull/2847
* feat(fetch) add redirect: 'error' support by @cirospaciari in https://github.com/oven-sh/bun/pull/2845
* Implement `describe.skip` by @blackmann in https://github.com/oven-sh/bun/pull/2836
* feat(dns) add support for { all: true } option on dns.lookup by @cirospaciari in https://github.com/oven-sh/bun/pull/2846
* add tests for ws.close by @cirospaciari in https://github.com/oven-sh/bun/pull/2844
* fix(fs) mkdtemp and mkdtempSync errors by @cirospaciari in https://github.com/oven-sh/bun/pull/2851
* fix redirect: 'manual' and setTimeout on node:http request by @cirospaciari in https://github.com/oven-sh/bun/pull/2848
* fix child process tests by @dylan-conway in https://github.com/oven-sh/bun/pull/2584
* bundler tests and improve `Bun.build` return type by @paperdave in https://github.com/oven-sh/bun/pull/2833
* Allow reading config from within plugins, and partially implement esbuild `initialOptions` by @paperdave in https://github.com/oven-sh/bun/pull/2861
* oops by @paperdave in https://github.com/oven-sh/bun/pull/2863
* fix large stdout output by @cirospaciari in https://github.com/oven-sh/bun/pull/2850
* fix(fetch:proxy) return correct status when permission is dennied by @cirospaciari in https://github.com/oven-sh/bun/pull/2860
* `root` bundle option by @dylan-conway in https://github.com/oven-sh/bun/pull/2859
* disable sloppy mode block level functions when not bundling by @dylan-conway in https://github.com/oven-sh/bun/pull/2864
* proper stub for http socket by @cirospaciari in https://github.com/oven-sh/bun/pull/2868
* windows path compatibility by @paperdave in https://github.com/oven-sh/bun/pull/2869
* Single-file standalone Bun executables by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2879
* feat(Timer.refresh) add refresh support on Timer by @cirospaciari in https://github.com/oven-sh/bun/pull/2874
* fix(spawn) add Uint8Array support for stdout by @cirospaciari in https://github.com/oven-sh/bun/pull/2866
* Fix bug with `req.url` set incorrectly by @Jarred-Sumner in https://github.com/oven-sh/bun/pull/2881
* Add plugins for yaml & RSC by @colinhacks in https://github.com/oven-sh/bun/pull/2888
* change the generated `debugId` suffix by @paperdave in https://github.com/oven-sh/bun/pull/2890
* bundler testing by @paperdave in https://github.com/oven-sh/bun/pull/2886
* handle printing missing expressions and add tests by @dylan-conway in https://github.com/oven-sh/bun/pull/2872
* feat(WebSocketServer) WebSocketServer wrapper + socket.io initial support by @cirospaciari in https://github.com/oven-sh/bun/pull/2880
* Fix running commonjs modules as entry point by @paperdave in https://github.com/oven-sh/bun/pull/2885
## New Contributors
* @privatenumber made their first contribution in https://github.com/oven-sh/bun/pull/2561
* @Lawlzer made their first contribution in https://github.com/oven-sh/bun/pull/2569
* @zhongweiy made their first contribution in https://github.com/oven-sh/bun/pull/2491
* @marktani made their first contribution in https://github.com/oven-sh/bun/pull/2647
* @Kruithne made their first contribution in https://github.com/oven-sh/bun/pull/2657
* @will-richards-ii made their first contribution in https://github.com/oven-sh/bun/pull/2661
* @simon04 made their first contribution in https://github.com/oven-sh/bun/pull/2662
* @flakey5 made their first contribution in https://github.com/oven-sh/bun/pull/2702
* @MaanuVazquez made their first contribution in https://github.com/oven-sh/bun/pull/2706
* @Plecra made their first contribution in https://github.com/oven-sh/bun/pull/2723
* @silversquirl made their first contribution in https://github.com/oven-sh/bun/pull/2750
* @aquapi made their first contribution in https://github.com/oven-sh/bun/pull/2747
* @blackmann made their first contribution in https://github.com/oven-sh/bun/pull/2836
**Full Changelog**: https://github.com/oven-sh/bun/compare/bun-v0.5.9...bun-v0.6.0