# Upcoming release 1.15.0

**URL:** <https://forum.crystal-lang.org/t/upcoming-release-1-15-0/7537>\
**Category:** Official\
**Created:** [December 17, 2024, 8:40pm UTC](https://forum.crystal-lang.org/t/upcoming-release-1-15-0/7537 "2024-12-17T20:40:43Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![straight-shoota](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.crystal-lang.org/straight-shoota/32/36_2.png) [@straight-shoota](https://forum.crystal-lang.org/u/straight-shoota)\
**Post date:** [December 17, 2024, 8:40pm UTC](https://forum.crystal-lang.org/t/upcoming-release-1-15-0/7537/1 "2024-12-17T20:40:43Z")

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The next Crystal release, 1.15 is scheduled for **January 9**.

As usual, this is precluded by a two-week feature freeze period, starting December 25. We’ll be using this time until the release to consolidate the changes and fix bugs.

A preview of the release notes is available: [Crystal 1.15.0 is released! - The Crystal Programming Language](https://deploy-preview-878--crystal-website.netlify.app/2025/01/09/1.15.0-released/) (PR: [#878](https://github.com/crystal-lang/crystal-website/pull/878))

Some of the highlights:

- [New Event Loop for Unix systems](https://crystal-lang.org/2024/11/05/lifetime-event-loop/)
- [Updated formatter rules](https://github.com/crystal-lang/crystal/pull/14718)
- Support for additional Windows platforms: MSYS2, MinGW-w64 and Aarch64
- More portable `Process::Status`

Behind the scenes we’re continuously improving the concurrency runtime and started integrating multi-theaded execution contexts from [GitHub - ysbaddaden/execution\_context](https://github.com/ysbaddaden/execution_context/) ([RFC 2](https://github.com/crystal-lang/rfcs/pull/2)).

You can find all changes in the [(provisional) changelog](https://github.com/crystal-lang/crystal/blob/changelog/1.15.0/CHANGELOG.md) (PR: [#15277](https://github.com/crystal-lang/crystal/pull/15277)).

There will be further additions to these resources as we merge additional changes.

The current HEAD of the master branch serves as a preview of the release. We appreciate any report of regressions caused by our latest nightly builds.

Instructions for installing nightly builds are available at [Nightlies - The Crystal Programming Language](https://crystal-lang.org/install/nightlies/)

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<div class="post-metadata">

**Author:** ![zw963](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.crystal-lang.org/zw963/32/1623_2.png) [@zw963](https://forum.crystal-lang.org/u/zw963)\
**Post date:** [December 18, 2024, 5:44am UTC](https://forum.crystal-lang.org/t/upcoming-release-1-15-0/7537/2 "2024-12-18T05:44:30Z")

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Any update for [this](https://github.com/crystal-lang/crystal/issues/15214) performance loss regression when enable mt?