# Deno v1.7.1 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.7.1
- **Released:** Jan 29, 2021
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.7.1/

## Executive Summary (TL;DR)
Deno v1.7.1. Source highlight: feat(lsp, unstable): add performance measurements (#9209)

## New Features
- feat(lsp, unstable): add performance measurements (#9209)
- feat(std/node): Add support for process.on("exit") (#8940)

## Bug Fixes
- fix(cli): IO resource types, fix concurrent read/write and graceful close (#9118)
- fix(cli): Move WorkerOptions::deno types to unstable (#9163)
- fix(cli): add lib dom.asynciterable (#9288)
- fix(cli): correctly determine emit state with redirects (#9287)
- fix(cli): early abort before type checking on missing modules (#9285)
- fix(cli): enable url wpt (#9299)