Deno v1.34.3 — Release Notes & Engineering Impact

Source available — automated, not human-reviewed

Component: deno · Channel: stable. Automated analysis, not a compatibility certification. How this works.

Analysis updated: 2026-11-01.

Compatibility not verified — check source notes

📄 .MD

✨ Features 1 ⚡ Improvements 6 🔧 Bug Fixes 6

⚡ Executive Summary (TL;DR)

Deno v1.34.3. Source highlight: feat(UNSTABLE) kv queue implementation (#19459)

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Who Does This Impact? (Role-Based Analysis)

💻 Software Engineers & Devs

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📊 Product & Engineering Leads

Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.

⚙️ DevOps & Security

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✨ New Features & Capabilities (1)

feat(UNSTABLE) kv queue implementation (#19459)

⚡ Performance & Enhancements (6)

perf(ext/http): from_maybe_shared_unchecked for header values (#19478)
perf(http): cache verified headers (#19465)
perf(node): cache realpath_sync calls in read permission check (#19379)
perf(serve): hoist promise error callback (#19456)
perf(serve): hoist repeated condition (#19449)
perf(web): optimize timer resolution (#19493)

🔧 Bug Fixes & Patches (6)

fix(cli): avoid crash on import of invalid module names (#19523)
fix(compile): some npm dependencies were missing in compiled output (#19503)
fix(config): do not canonicalize config file path before loading (#19436)
fix(ext/http): Include hostname in onListen argument (#19497)
fix(ext/http): replace await Deno.serve with await Deno.serve().finished
fix(ext/node): HTTPS server (#19362)

📄 View Raw Release Notes (Original Developer Log)

### 1.34.3 / 2023.06.15 - feat(UNSTABLE) kv queue implementation (#19459) - fix(cli): avoid crash on import of invalid module names (#19523) - fix(compile): some npm dependencies were missing in compiled output (#19503) - fix(config): do not canonicalize config file path before loading (#19436) - fix(ext/http): Include hostname in onListen argument (#19497) - fix(ext/http): replace await Deno.serve with await Deno.serve().finished (#19485) - fix(ext/node): HTTPS server (#19362) - fix(ext/node): handle 'upgrade' responses (#19412) - fix(ext/node): make Buffer.slice be the same as subarray (#19481) - fix(ext/websockets): ensure we fully send frames before close (#19484) - fix(fmt): do not panic formatting json with multiple values (#19442) - fix(lsp): don't pre-load documents matched in the config file's "exclude" (#19431) - fix(lsp): update import map config when deno.json changes (#19476) - fix(ext/node): Worker constructor doesn't check type: module of package.json (#19480) - fix(npm): warn when tarball contains hardlink or symlink (#19474) - fix: reload config files on watcher restarts (#19487) - perf(ext/http): from_maybe_shared_unchecked for header values (#19478) - perf(http): cache verified headers (#19465) - perf(node): cache realpath_sync calls in read permission check (#19379) - perf(serve): hoist promise error callback (#19456) - perf(serve): hoist repeated condition (#19449) - perf(web): optimize timer resolution (#19493) - perf: don't run microtask checkpoint if macrotask callback did no work (#19492) - perf: optimize ByteString checks, hoist server rid getter (#19452)

← Older Version Deno v1.34.2 Newer Version → Deno v1.35.0