# Deno v1.10.1 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.10.1
- **Released:** May 12, 2021
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.10.1/

## Executive Summary (TL;DR)
Deno v1.10.1. Source highlight: Release Notes https://deno.com/blog/v1.10

## New Features
- feat: "deno test" prompts number of tests and origin (#10428)
- feat: "Worker.postMessage()" uses structured clone algorithm (#9323)
- feat: add "deno test --doc" (#10521)
- feat: add "deno test --jobs" (#9815)
- feat: add "deno test --watch" (#9160)
- feat: add test permissions to Deno.test (#10188)

## Bug Fixes
- fix(#10603): Disable lsp workspaces, resolve deadlock bug
- feat(lsp): add internal debugging logging (#10438)
- fix: invalid types for asynchronous and synchronous `File#truncate` (#10353)
- fix: rename Deno.emit() bundle options to "module" and "classic" (#10332)
- fix: sleepSync doesn't return a Promise (#10358)
- fix: TextEncoder#encodeInto spec compliance (#10129)