# Deno v1.39.0 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.39.0
- **Released:** Dec 13, 2023
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.39.0/

## Executive Summary (TL;DR)
Deno v1.39.0. Source highlight: Reland "fix(ext/console): fix inspecting iterators error. (#20720)" (#21370)

## New Features
- feat(compile): support "bring your own node_modules" in deno compile (#21377)
- feat(compile): support discovering modules for more dynamic arguments (#21381)
- feat(coverage): add html reporter (#21495)
- feat(coverage): add summary reporter (#21535)
- feat(cron): added the support for json type schedule to cron api (#21340)
- feat(ext/fetch): allow `Deno.HttpClient` to be declared with `using` (#21453)

## Improvements
- perf(ext/ffi): switch from middleware to tasks (#21239)
- perf(ext/napi): port NAPI to v8 tasks (#21406)
- perf(ext/url): improve URLPattern perf (#21488)
- perf(ext/web): Avoid changing prototype by setting hostObjectBrand directly
- perf(lsp): collect counts and durations of all requests (#21540)
- perf(lsp): instrument all ops with performance marks (#21536)

## Bug Fixes
- Reland "fix(ext/console): fix inspecting iterators error. (#20720)" (#21370)
- feat(lsp): debug log file (#21500)
- feat(lsp): provide quick fixes for specifiers that could be resolved sloppily
- fix (doc): Typo in `runtime/README.md` (#20020)
- fix(cli/installer): percent decode name (#21392)
- fix(compile/npm): ignore symlinks to non-existent paths in node_modules