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Fixes 46 bugs (addressing 570 👍). Musl LibC support, JUnit XML test output, 6 MB binary size reduction, Worker preload option, faster fs.readFile for small files, deep equality support for Headers and URLSearchParams, node:net compatibility improvements, unicode import bugfixes, several bun install fixes

Rearranging JavaScriptCore types to match V8 code's assumptions

Fixes 64 bugs (addressing 62 👍). Bun.randomUUIDv7, reduced memory usage for long-running processes, napi_type_tag_object and napi_check_object_type_tag, redacted secrets from config logs, ReadableStream and HTTP/1.1 spec fixes, several bun install and Node.js compatibility improvements

Fixes 8 bugs. Fixes JSX symbol collisions with imports, fixes a bun install slowdown, skips optional dependency, fixes optional dependency postinstall failures, and fixes an assertion failure in the CSS parser.

Fixes 7 bugs and adds crypto.hash() in node:crypto. Warnings in Next.js 15 are fixed. A regression in ESM <> CJS interop impacting Vite config objects is fixed. A crash in Bun.serve() when passing invalid TLS certificates at start is fixed.

Fixes 41 bugs (addressing 595 👍). node:http2 server and gRPC server support, ca and cafile support in bun install, Bun.inspect.table, bun build --drop, iterable SQLite queries, iterator helpers, Promise.try, Buffer.copyBytesFrom, and several Node.js compatibility improvements and bugfixes.

Fixes 57 bugs (addressing 150 👍) Bun's CSS bundler is here (and very experimental). bun publish is a drop-in replacement for npm publish. bun build --bytecode compiles to bytecode leading to 2x faster start time. Bun.color() formats and normalizes colors. bun pm whoami prints your npm username. bun install reads $HOME/.npmrc. bun build --format=cjs outputs CommonJS modules. bun build --target=node now supports Node.js native addons. 30x faster crypto.privateEncrypt() & crypto.publicDecrypt(). Zombie process killer in bun test. --banner and --footer options in bun build. Bun.serve().stop() returns a promise. CryptoHasher now supports HMAC. Bugfixes for node:zlib, node:module, and node:buffer. Lots more bugfixes and Node.js compatibility improvements.

Bun is built on JavaScriptCore, not V8. Here's how we're implementing V8's C++ API on top of it.

Fixes 21 bugs (addressing 22 👍). Fixes issue with proxying requests with axios. N-API (napi) support in compiled C. Faster typed arrays in bun:ffi with 'buffer' type. Fixes issue with bundling imported .wasm files in bun build. Fixes regression with bun build from v1.1.28. Fixes snapshot regression in bun test. Fixes bug with argument validation in Bun.build plugins.

This release fixes 40 bugs (addressing 51 👍). Compile & run C from JavaScript. 30x faster path.resolve. Named pipes on Windows. Several Node.js compatibility improvements and bugfixes.

Bun now supports compiling and running C from JavaScript to make using systems libraries easier.

Fixes 130 bugs (addressing 250 👍). bun pm pack, faster node:zlib. Static routes in Bun.serve(). ReadableStream support in response.clone() & request.clone(). Per-request timeouts. Cancel method in ReadableStream is called. bun run handles CTRL + C better. Faster buffered streams. bun outdated package filtering. Watch arbtirary file types in --hot and --watch. Fixes to proxies on Windows. Several Node.js compatibility improvements.

Fixes 9 bugs (addressing 652 👍). bun oudated shows outdated dependencies. Bun.serve() gets a new idleTimeout option and subscriberCount(topic: string) for a count of websocket clients subscribed to a topic. test.only in bun:test now skips tests before and after instead of only after. expect.assertions(n) in async functionn is fixed. "use strict" in CommonJS modules is now preserved. Plus, more node.js compatibility improvements and bug fixes.

Fixes 42 bugs (addressing 470 👍). Support for node:cluster and V8's C++ API. Faster WebAssembly on Windows with OMGJIT. 5x faster S3 uploads with @aws-sdk/client-s3, Worker in standalone executables, and more Node.js compatibility improvements and bug fixes.

Support for TextEncoderStream and TextDecoderStream, 50% faster console.log(string), support for Float16Array, Node.js<>Bun IPC on Windows, truncate large arrays in console.log(), and many more bug fixes and Node.js compatibility improvements.

Fixes 79 bugs (addressing 93 👍). Express is now 3x faster in Bun, ES modules load faster on Windows, 10% faster Bun.serve() at POST requests, source maps in bun build --compile. Memory usage reductions to --hot, Bun.serve(), and imports. Uint8Array.toBase64(), Uint8Array.toHex(), and lots of Node.js compatibiltiy improvements and bugfixes.

Fixes 72 bugs (addressing 63 👍). 30% faster fetch() decompression, New --fetch-preconnect flag, improved Remix support, Bun gets 4 MB smaller on Linux, bundle packages excluding dependencies, many bundler fixes and node compatibility improvements.

Fixes 54 bugs (addressing 248 👍). JavaScript gets faster on Windows. Raspberry Pi 4 support returns. _auth support in .npmrc. bun install preserves package.json indentation. aws-cdk-lib support. Memory leak fixes in new Response(request) and fs.readdir. Several reliability improvements. Statically linked UCRT on Windows.

Fixes 55 bugs (addressing 493 👍). Support for npmrc. Improved constant folding & enum inlining. Improved console.log output for functions. Fixes patching dependencies in workspaces. Fixes several bugs in bun install when linking binaries. Fixes a crash in dns.lookup, and normalizes DNS errors to better match Node. Fixes an assertion failure in Bun.escapeHTML. Upgrades JavaScriptCore.

Fixes 4 bugs. Fixes a crash in bun repl. Makes fs.readdirSync 5% faster on macOS in small directories. Fixes "ws" module not calling the callback in "send" method. Fixes a crash when reading a corrupted lockfile in bun install. Makes macOS event loop a smidge faster.

Fixes 41 bugs (addressing 221 👍). lcov code coverage reports in bun test, Install dependencies from private git repositories including Gitlab and Bitbucket. Buffer.from(string, "base64") gets 6x - 30x faster on large input. Bug fixes to bun patch, bun install, N-AIi addons, transpiler bugfixes and Node.js compatibility improvements.

Fixes 63 bugs (addressing 519 👍). Patch node_modules with bun patch. ORM-less object mapping in bun:sqlite. Log fetch() calls as curl commands. Node.js compatibility improvements. bun install bugfixes, bun:sqlite bugfixes, WebSocket fixes, Windows bugfixes

Fixes 97 bugs (addressing 211 👍). Reliability improvements to bun install, WebSocket server, fetch, worker_threads. worker_threads now supports eval. URL.createObjectURL, stack trace error location improvements, several bun install fixes, and many crashes and bugs fixed.

Fixes 36 bugs (addressing 362 👍). bun update saves dependency updates to package.json. A peer dependencies resolution bug in bun install is fixed. setTimeout gets 5x faster throughput on Linux. Node.js compatibility improvements to fs, zlib, timers, http, dgram and module. Event loop improvements on macOS. Windows reliability improvements.

Fixes 20 bugs. 2x faster uncached bun install on Windows. fetch() uses up to 2.8x less memory. Several bugfixes to bun install, sourcemaps, Windows reliability improvements and Node.js compatibility improvements

Fixes 67 bugs (addressing 150 👍). Fixes to: workspaces in bun install, sourcemaps in bun build, IPv6 & VPN connectivity, Loading UNC paths, junctions, symlinks, and pnpm on Windows, fetch() gets faster, added dns.prefetch() API, atob() gets 8x faster, toString('base64url') gets 5x faster, expect().toBeReturned() matcher, Node.js compatibility improvements, Bun Shell fixes, and lots more bugfixes.

Fixes 54 bugs (addressing 184 👍). Support for process.on("uncaughtException") and process.on("unhandledRejection"), Brotli support in node:zlib, Faster JSON.parse, [Symbol.dispose] in Bun APIs, fixes lots of crashes on Windows, and many other bugfixes.

Fixes 28 bugs (addressing 11 👍). Glob workspace names in bun install. Asymmetric matcher support in expect.extends() equals. bunx --version. Bugfixes to JSX transpilation, sourcemaps, cross-compilation of standalone executables, bun shell, RegExp, Worker on Windows, and Node.js compatibility improvements.

Fixes 10 bugs (addressing 512 👍). UDP sockets! node:dgram! DataDog and ClickHouseDB! Fixes a bug impacting SvelteKit. Array#sort gets 15% - 135% faster. Fixes a regression in node:http from v1.1.5. Node.js compatibiltiy improvements and bugfixes.

Fixes 64 bugs (addressing 101 👍). Cross-compile standalone JavaScript & TypeScript executables to other platforms with bun build --compile. import any file as text via the type: 'text' import attribute. Introduces a new crash reporter. package.json with comments and trailing commas. Fixes a bug where bun run --filter exited with 0. Fixes a bug in bun install with file: dependencies. Fixes bugs in node:tls, node:crypto, node:readline, node:http, node:worker_threads

How we built an anonymous Zig/C++ crash reporter that doesn't require debug symbols to be shipped with the application.

Fixes 40 bugs (addressing 84 👍 reactions). bun run --filter <workspace> <script> lets you run multiple workspace scripts in parallel. Reinstalls get up to 50% faster in bun install. Important reliability fixes to bun install. bun:sqlite supports using for resource cleanup and has a few bugfixes. Memory leak impacting Next.js Standalone & Web Streams is fixed. Node.js compatibility improvements to fs and child_process. Fix for 'Connection closed' in fetch(). A few bugfixes for Bundows.

Fixes 5 bugs. bun install gets 50% faster on Windows. A bug that could cause bun install to hang in rare cases has been fixed. A bug where some errors in bun install would not produce a non-zero exit code has been fixed. A bug that could cause specific certain combinations of dependencies to fail to install has been fixed. A bug on Windows where CTRL + C on cmd.exe after exiting bun would not behave as expected has been fixed. A bug where missing permissions on Windows for reading a directory could lead to a crash has been fixed.

Fixes 4 bugs (addressing 44 👍 reactions). EBUSY on Windows in vite dev, next dev, and saving bun.lockb has been fixed. Object cloning gets 6x faster. Bun Shell gets support for seq, yes, basename and dirname. A TypeScript parsing edgecase has been fixed. A bug causing 'unreachable code' errors has been fixed. fs.watch on Windows has been rewritten to improve performance and reliability.

Fixes 20 bugs (addressing 60 👍). Add subshell and positional argument support to Bun Shell, fixing an issue with bun install + sharp on Windows. Printed source code in errors no longer fill up your terminal. Upgrades JavaScriptCore, which includes performance improvements to RegExp, typed arrays, String indexOf and String replace. Error objects and JIT'd function calls use less memory. Fixes several bugs with bun install on Windows. Fixes a bug with Bun.serve() on Windows. Fixes a TOML parser bug impacting escape sequences and windows paths in .toml files

Bun now supports Windows!

Fixes 13 bugs. Adds support for fs.openAsBlob and fs.opendir, fixes edgecase in bun install with multiple bin entries in package.json, fixes bun build --target bun encoding, fixes bug with process.stdin & process.stdout, fixes bug in http2, fixes bug with .env in bun run, fixes various Bun shell bugs and improves Node.js compatibility.

Fixes 7 bugs, bunx uses less memory, bun install gets faster on Docker & WSL, a conflicting devDependency hoisting bug is fixed, a cyclical CommonJS & ESM import crash is fixed, cross-mount fs.cp & fs.copyFile get 50% faster on Linux, and reliability improvements for bun install & bun's runtime

Fixes 13 bugs, including 3 I/O regressions from v1.0.31. Improves Node.js compatibility. 'ws' package can now send & receive ping/pong events. util.promisify'd setTimeout setInterval, setImmediate work now. FileHandle methods have been implemented

Fixes 2 bugs, including a bug with the mv command in Bun Shell and an error in node:crypto when verifying signatures

Fixes 54 bugs (addresses 113 👍 reactions), introduces bun --print, <stdin> | bun run -, bun add --trust, fetch() with Unix sockets, fixes macOS binary size regression, fixes high CPU usage bug in spawn() on older linux, adds util.styleText, Node.js compatibiltiy improvements, bun install bugfixes, and bunx bugfixes

Fixes 27 bugs (addressing 103 👍 reactions), fixes an 8x perf regression in Bun.serve(), adds a new --conditions flag to bun build and Bun's runtime, adds support for expect.assertions() and expect.hasAssertions() in Bun's test runner, fixes crashes and improves Node.js compatibility

Fixes 8 bugs. Bun.stringWidth(a) is a ~6,756x faster drop-in replacement for the popular 'string-width' package. bunx checks for updates more frequently. Adds expect().toBeOneOf() in bun:test. Memory leak impacting Prisma is fixed. Shell now supports advanced redirects like '2>&1', '&>'. Reliability improvements to bunx, bun install, WebSocket client, and Bun Shell

Fixes 6 bugs (addressing 26 👍 reactions). Fixes bugs impacting Prisma and Astro, 'events', 'readline', and 'http2'. Fixes a bug in Bun Shell involving stdin redirection and fixes bugs in bun:test with test.each and describe.only

Fixes 72 bugs (addressing 192 👍 reactions), Bun Shell supports throwing on non-zero exit codes, stream Response bodies using async generators, improves reliability of fetch(), http2 client, Bun.Glob and Bun Shell. Fixes a regression with bun --watch on Linux. Improves Node.js compatibility

Fixes 30 bugs (addressing 60 👍 reactions), adds support for multi-statement queries in bun:sqlite, makes bun --watch more reliable in longer-running sessions, Bun.FileSystemRouter now supports more than 64 routes, fixes a bug with expect().toStrictEqual(), fixes 2 bugs with error.stack, improves Node.js compatibility

Fixes 4 bugs, adds vm.createScript. Fixes a crash in fs.readFile, a crash in Bun.file().text(), a crash in IPC, and a transpiler bug involving loose equals

Fixes 9 bugs and adds Bun Shell, a fast cross-platform shell with seamless JavaScript interop. Fixes a socket timeout bug, a potential crash when socket closes, a Node.js compatibility issue with Hapi, a process.exit bug, and bun install binlinking bug, bun inspect regression, and bun:test expect().toContain bug

The Bun Shell is a cross-platform shell that allows you to run shell scripts in JavaScript & TypeScript

Fixes 40 bugs (addressing 194 👍 reactions). import & embed sqlite databases in Bun, Resource Management ('using' TC39 stage3) support, bundler improvements when building for Node.js, bugfix for peer dependency resolution, semver bugfix, 4% faster TCP on linux, Node.js compatibility improvements and more

Fixes bun install issues on Vercel, adds performance.mark() APIs, adds child_process support for extra pipes, makes Buffer.concat 10% - 400% faster, adds toBeEmptyObject and toContainKeys matchers, fixes console.table width using emojis, and adds support for argv and execArgv options in worker_threads.

Fixes 33 bugs (addressing 80 👍 reactions). console.table() support. Bun.write, Bun.file, and bun:sqlite use less memory. Large file uploads with FormData use less memory. bun:sqlite error messages get more detailed. Memory leak in errors from node:fs fixed. Node.js compatibility improvements, and many crashes fixed

Reduced memory usage for fs.readlink, fs.writeFile, fs.stat and HTMLRewriter. Fixes a regression where setTimeout caused high CPU usage on Linux. Bun.spawn shows how much CPU & memory the process used. HTMLRewriter.transform now supports strings and ArrayBuffer. fs.writeFile() and fs.readFile() now support hex & base64 encodings

Fixes 26 bugs (addressing 92 👍 reactions). Use @types/bun instead of bun-types. Fixes --frozen-lockfile bug. bcrypt & argon2 packages now work. setTimeout & setInterval get 4x higher throughput. module mocks in bun:test resolve specifiers. Optimized spawnSync() for large stdio on Linux. Bun.peek() gets 90x faster, expect(map1).toEqual(map2) gets 100x faster. Bugfixes to NAPI, bun install, and Node.js compatibility improvements

Fixes 27 bugs (addressing 28 👍 reactions). A hang impacting create-vite & create-next & stdin has been fixed. Lifecycle scripts reporting "node" or "node-gyp" not found has been fixed. expect().rejects works like Jest now, and more bug fixes

Fixes 15 bugs (addressing 152 👍 reactions). bun install postinstall scripts run for top 500 packages, bunx supabase starts 30x faster than npx supabase, bunx esbuild starts 50x faster than npx esbuild and bugfixes to bun install

Fixes 49 bugs (addressing 38 👍 reactions). Concurrent IO for Bun.file & Bun.write gets 3x faster and now supports Google Cloud Run & Vercel, Bun.write auto-creates the parent directory if it doesn't exist, expect.extend inside of preload works, napi_create_object gets 2.5x faster, bugfix for module resolution impacting Astro v4 and p-limit, console.log bugfixes

Fixes 23 bugs (addressing 117 👍 reactions), tsc starts 2x faster, prettier 40% faster. Stable WebSocket client, syntax-highlighted errors, cleaner stack traces, add custom test matchers with expect.extend(), TensorFlow.js support, fs.readdir recursive is 40x faster than in Node, and more.

Introduces Bun.Glob - a fast glob matcher, fixes a race condition when extracting dependencies during bun install, improves TypeScript module resolution in node_modules, makes error messages easier to read, and more fixes.

Fixes 6 bugs (addressing 317 👍 reactions). 'http2' module & gRPC.js work now. Vite 5 & Rollup 4 work. Implements process.report.getReport(), improves support for ES5 'with' statements, fixes a regression in bun install, fixes a crash when printing exceptions, fixes a Bun.spawn bug, and fixes a peer dependencies bug

Fixes 24 bugs, makes bun's CLI help menus easier to read, adds support for bun -e, bun --env-file, server.url, import.meta.env, expect.unreachable(), improves support for module mocks, allows importing builtin modules at bundle-time, and improves Node.js compatibility

Fixes 5 bugs, adds Bun.semver, fixes a bug in bun install and fixes bugs impacting astro and @google-cloud/storage

Fixes 14 bugs (addressing 102 👍 reactions), node:http gets 14% faster, stability improvements to Bun for Linux ARM64, bun install bugfix, and node:http bugfixes

Fixes a glibc symbol version error, illegal instruction error, a Bun.spawn bug, an edgecase with peer dependency installs, and a JSX transpiler bugfix

Fixes 138 bugs (addressing 257 👍 reactions), makes require() use 30% less memory, adds module mocking to bun test, and improves reliability of bun install and Bun.spawn

Fixes 59 bugs (addressing 78 👍 reactions), support for optional peerDependencies, improvements to Node.js compatibility, and more stability for bun install.

Fixes 3 bugs (addressing 85 👍 reactions), implements support for the 'overrides' & 'resolutions' fields in package.json and a regression impacting Docker usage with Bun

Fixes 41 bugs + a memory leak in fetch(), KeyObject support in crypto module, import package-lock.json, install peer dependencies, bun pm migrate subcommand, bun install bugfixes, and toEqualIgnoringWhitespace matcher in bun:test

Bun v1.0.4 fixes 62 bugs, adds server.requestIP, supports virtual modules in runtime plugins, fixes many bun install bugs, and reduces memory consumption in Bun.serve()

emitDecoratorMetadata, Nest.js support, better private registry support, bunx bugfix, console.log() depth 8 -> 2, silence .env loaded message, and many bugfixes

Faster watch mode, bunx @latest bugfix, Bun uses V8's date parser, bugfixes to node:readline, node:dns, bun run, http streaming, transpiler, node:tty and more

Named imports for .json & .toml files, bugfixes to bun install, node:path, Buffer. Support for NODE_TLS_REJECT_UNAUTHORIZED=0

Bun is stable and ready for production.

Bun.serve() gets unix domain socket support, a performance regression has been fixed, and bugs in bun install, node:http and napi have been fixed

Bun gets debugger support, fetch streaming, and bun update. ReadStream and WriteStream from node:tty are implemented, including raw mode on process.stdin. SvelteKit now works in Bun. Plus bug fixes and stability improvements.

bun test gets code coverage reporting. bun test -t pattern lets you filter tests to run by regex pattern. Fixes a crash in bun:sqlite, node.js compatiblity improvements, and more.

worker_threads, BroadcastChannel, diagnostics_channel, Node.js compatibility improvements, bun ., bugfixes and 2 memory leaks fixed

Node.js compatibility improvements for Vite & frameworks. Better workspace support in bun installl & a bugfix for private registries. ES Modules load 30% faster. vite dev starts 90% faster on Linux. Transpiler bugfixes. fetch() file urls. MessagePort & MessageChannel.

vite dev support, Workers, bun --smol, WebSocket.ping(), structuredClone(), serialize() and better Node.js compatibility

Better support for Node.js process and lots of fixed bugs.

Mock Date, 10x faster base64 encoding, WebSocket client reliability improvements, support for postgres tls and nodemailer, and various bug fixes.

CommonJS is here to stay, and that's okay. Better tooling will solve today's developer experience issues.

Sourcemapped stack traces at runtime, Node.js compatibility improvements, Bun.file(path).exists, minifier and bundler bugfixes

Reduced memory usage, fs.watch(), better CommonJS support, improvements to bun test, bun install, and many bugfixes.

Memory usage reductions in Bun.serve(), bun install, module imports, and crypto hashing. Crash in CommonJS modules fixed, plus additional bugfixes.

Password hashing, function mocking, debugging, and bug squashing

Discord.js, Prisma, and Puppeteer support, faster node:crypto hashing, and lots of bug fixes

Lots of improvements to bun test, including Github Actions support, bun test --only, test.if(), describe.skip(), and more matchers

Call JavaScript functions at bundle-time and inline results into the AST

Native CommonJS support, $npm_lifecycle_event, bugfix for Bun.serve() with streaming files, bugfix for Node.js createConnection and a bundler bugfix

Up to 80% faster bun test, test timeouts, timezone support, bundler bugfixes, console.log() improvements, node:http bugfixes, and more

Introducing node:vm support, support for socket.io and mongodb, test.todo(), and many bug fixes for the bundler.

Up to 20% faster JSON.parse, 15% faster JSON.stringify, and Proxy gets faster. A couple bugfixes to the minifier and bundler

The Bun toolkit gets a new addition. Bun's fast native bundler is now in beta.

A new JavaScript bundler, standalone executables, and lots of new features and improvements

Introducing watch mode using bun --watch, tarball dependencies in bun install, and lots of bug fixes and compatibility improvements.

Introducing expect() snapshots in bun test, preloading modules using bun --preload, basic glob star support in bun install, improvements to Web & Node.js compatibility, lots of bug fixes, and a teaser of what's next.

Bun has docs now? Bun has docs now.

Support for FormData and git dependencies, better setTimeout() compatibility, bun wiptest is now bun test, and better support on AWS Lambda and GitHub Actions.

Support for Bun.sleep, improved Docker support, and improvements to Node.js and npm compatibility

Improved compatibility for node:http, support for http.request() and stripe-node, and fixed various bugs.

MongoDB support, github: dependencies in bun install, faster Buffer, bun run for WebAssembly, express' body-parser package, and many bug fixes.

Support for aliasing package.json dependencies, a better error message when a workspace is not found, and a few important bug fixes.

Support for npm workspaces, DNS lookups, database drivers, and lots of improvements to bun install.

Introducing bunx. Install and run an executable from npm, 100x faster than npx.

Massive reduction in memory usage, faster text encoding, improved Jest compatibility, file-system routing, automatic package installs, and a lot more

Release notes for Bun v0.2.2

Release notes for Bun v0.2.1

Release notes for Bun v0.2.0

Release notes for Bun v0.1.12

Release notes for Bun v0.1.11

Release notes for Bun v0.1.10

Release notes for Bun v0.1.9

Release notes for Bun v0.1.8

Release notes for Bun v0.1.7

Release notes for Bun v0.1.6

Release notes for Bun v0.1.5

Release notes for Bun v0.1.4

Release notes for Bun v0.1.3

Release notes for Bun v0.1.2

Release notes for Bun v0.1.1