bun
https://github.com/oven-sh/bun
Zig
Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one
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- Issues
- fs: port Node.js fs compatibility tests and fix the gaps they surface — cp error semantics, watcher event delivery, watch ignore+AbortSignal, stream/iter + FileHandle pull/writer, glob port, opendir/Dir, mkdtempDisposable, rmdir-recursive removal (+122 tests)
- node:inspector: report features.inspector=false and port the Node.js inspector test suite — NODE_V8_COVERAGE warning, Runtime.consoleAPICalled for in-process sessions (84/84 passing, +77 vendored tests)
- trace_events: implement Node's trace-events subsystem and port the v26.3.0 trace tests — JSON trace writer, --trace-event-* / --trace-env / --trace-exit flags, per-subsystem events, worker tids, NodeTracing inspector domain (+34 tests, 100% passing)
- Rename Zig-prefixed names in the JSC bindings to Bun equivalents
- node:stream: sync the stream suite to Node v26.3.0 and fix the gaps it surfaces — stream/iter + zlib/iter behind --experimental-stream-iter, read()-one-buffer semantics, compose/pipeline/web-adapter/http/fs/net parity (247/251 upstream tests, +63 vendored)
- node:repl: replace the stub with Node v26.3.0's REPL — v26 readline stack, acorn recoverable-parse + top-level await, completion, history, --interactive (+107 vendored tests, 74 passing)
- Don't crash at startup when a standalone executable's embedded graph is corrupted
- bun test --isolate: reclaim the previous file's module graph on global swap
- Expose Node's `Immediate._onImmediate` on `setImmediate()` return value
- bundler: integrate React Compiler (Rust port) behind --react-compiler
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