- Add string abbreviation size option for Deno.inspect and compact empty iterable handling in console;
- Introduce HTTP auto-response body compression, fast‑path for uncompressed bodies, better compressibility checks, and streaming body optimizations;
- Fix numerous issues across benchmarks, CLI, testing, workers, spawn, watcher, and UI colors, plus performance boosts for file reads and V8 ser/de zero‑copy.
v1.21.1
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Added an unscoped flag for package aliasing, a members‑only flag for workspace tasks, Blob/Body.textStream() API, and an experimental QuickJS backend.
Added HMR support for React Router on desktop, new length/byteLength parameters for Buffer searches, raw ChaCha20 cipher support, and upgraded V8 to 150.2.0.