Bun.serve gets directory tree routes (
0c88489)
Bun.serve() can now mount a whole directory at a wildcard route via { dir: "..." }, serving static files with path cleanup, cache headers, range support, and index/redirect handling. This turns Bun into a much more capable built-in static file server and adds a new public route type to the API.
--compile gains --asset for embedded directories (fec68b1)
Standalone binaries can now embed files and directory trees under import.meta.dir, and the runtime exposes them through node:fs and Bun.file(). That removes a major limitation for apps that enumerate their own static assets at startup, including adapters that expect a real directory layout inside the compiled executable.
bun:ffi switches to engine-native FFI (
01b81aa)
Bun reimplements dlopen, linkSymbols, CFunction, and JSCallback on top of JavaScriptCore’s native FFI, with hot calls compiling down to direct native calls. That’s a major performance and compatibility shift for FFI-heavy apps, and it also trims Bun’s dependence on the older TinyCC-based path.
WebSocket client now fires upgrade and unexpected-response (9d7f85e)
The bundled ws client finally implements the 'upgrade' and 'unexpected-response' events instead of warning and stubbing them out. This unblocks frameworks and tooling that rely on those hooks to complete fetch/dispatch flows and handle proxy or handshake outcomes correctly.
DNS connect-path interleaving fixes IPv6 blackhole stalls (6c04f4b)
Bun’s resolver now interleaves address families per RFC 8305 instead of letting one family monopolize parallel connection attempts. That fixes a class of bun install hangs on dual-stack networks with broken IPv6 and directly addresses several long-standing DNS/connectivity bugs.
HTTP and fetch edge cases are tightened up
Several commits harden request/response behavior around real-world aborts and connection teardown: macOS mid-upload aborts now send FIN instead of leaving peers stuck, non-2xx responses now honor Connection: close, and fetch() body errors now mark streams disturbed and surface network failures as TypeError.
Other misc changes
- Rust visibility pruning and dead-code deletion across the workspace (77ab49c)
- Web Streams runtime/controller refactors and GC safety fixes (fc724fd, a96934f)
net.Socket/child_process/ DNS timeout correctness fixes (9258ee8, d437834, c19d8d5)- SQL auth loop and timeout hardening for MySQL/Postgres (b4ee407)
- Compile/PE metadata fixes, including hidden-console GUI subsystem support (cb2fd4b, dc2b325)
- Test deflakes, concurrency speedups, and CI/batch runner tweaks (9d547fd, b89452a, e1b8e61, 960a91e, ccc6110, 6c7fba9, 378576e, effa1f9, 23d1df7, 9987d42, 4926963, 59242d6, 0316b6f, e820221, 564e723, ad09191, 79d547fd)