# Deno v1.25.3 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.25.3
- **Released:** Sep 15, 2022
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.25.3/

## Executive Summary (TL;DR)
Deno v1.25.3. Source highlight: doc(unstable): mention that `signal` input isn't supported in `spawnSync`

## Improvements
- perf(ext/flash): remove string->buffer cache (#15850)
- perf(serde_v8): remove Mutex from ZeroCopyBuf (#15888)
- perf(url): return early if url has no query string (#15856)
- perf: optimize URL serialization (#15663)

## Bug Fixes
- fix(ext/flash): don't block requests (#15852)
- fix(npm): align Deno importing Node cjs with Node esm importing cjs (#15879)
- fix(npm): align Node esm code importing cjs with Node (#15838)
- fix(npm): binary entrypoint for .js or no extension (#15900)
- fix(npm): remove export binding to match node (#15837)
- fix(npm): support cjs resolution of package subpath with package.json (#15855)