# Deno v1.14.1 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.14.1
- **Released:** Sep 21, 2021
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.14.1/

## Executive Summary (TL;DR)
Deno v1.14.1. Source highlight: fix(cli): don't ignore diagnostics about for await (#12116)

## Improvements
- perf(ext/web): optimize EventTarget (#12166)
- perf(runtime/fs): optimize readFile by using a single large buffer (#12057)
- perf(web): optimize AbortController (#12165)

## Bug Fixes
- fix(cli): don't ignore diagnostics about for await (#12116)
- fix(cli): move Deno.flock and Deno.funlock to unstable types (#12138)
- fix(cli/fmt_errors): Abbreviate long data URLs in stack traces (#12127)
- fix(config-schema): correct default value of "lib" (#12145)
- fix(core): prevent multiple main module loading (#12128)
- fix(ext/crypto): don't use core.decode for encoding jwk keys (#12088)