Bun

Shipped Bun v1.4 in August, followed by three patch releases through v1.4.3 in October.

Bun v1.4 opened the current series. The major release landed with its own blog post and a fresh install path at bun.com/install; bun upgrade remains the in-place upgrade. Follow-ups came fast — v1.4.1 and v1.4.2 within a day and a month, then v1.4.3 in early October.

The v1.3.x line closed out with real shipping. Carried forward from that series:

• Test isolation and CI tooling: --isolate, --parallel, --shard, and --changed
• Cheaper installs: streaming tarball extraction cut memory 17x, and the isolated linker took peer-heavy monorepos from 20.5s to 2.4s
• New native APIs: Bun.WebView, Bun.cron(), and Markdown-to-ANSI rendering via bun ./file.md
• A REPL rewritten in Zig, Windows ARM64 support, and self-contained HTML bundles through --compile --target=browser

Source maps moved to a bit-packed binary format using 8x less memory, and gzip got 5.5x faster. A request smuggling fix and an HTTP response splitting patch landed across the series.