@CrystalLanguage

A language for humans and computers

crystal-lang.org
Joined April 2015
  • Tweets878
  • Following140
  • Followers6K
145Media
A new patch release Crystal 1.20.1 fixes some regressions and disables Kernel TLS (added in 1.20.0), due to instability. Read more at crystal-lang.org/2026/04/29/… #crystallang

Crystal 1.20.1 is released!

We are announcing a new Crystal release 1.20.1 with a couple of regressions fixed.

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We proudly present: Crystal 1.22 Our newest and shiniest release 💎 It's also the biggest release since 1.0 with 251 changes in total. crystal-lang.org/2026/10/12/…

Crystal 1.22.0 is released!

We are announcing a new Crystal release 1.22.0 with several new features and bug fixes.

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Some highlights: - Performance improvements for DWARF loader - All targets support a native event loop - Constants can have type declarations - `Crystal::ALL_FLAGS` and `USER_FLAGS` - Upgraded package dependencies, docker base images etc. - Binaries for `aarch64-windows`
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A new patch release is out: Crystal 1.21.1 brings important security patches, and a regression fix for macOS 26.7+ crystal-lang.org/2026/09/26/… #CrystalLang

Crystal 1.21.1 is released!

We are announcing a new Crystal release 1.21.1 with important security patches, and a regression fix for macOS.

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Crystal Language retweeted
Serdar Dogruyol セド
@sdogruyolJul 31
I'm a Crystal @CrystalLanguage Core Team member and I created Kemal @crystalkemal (3.8k+ ⭐, 5M+ downloads). I've been building Crystal tools since 2015. Now I'm working on gcry, a %100 Crystal garbage collector for Crystal. Already at ~89% of Boehm GC throughput with ~0.95x RSS. I also maintain the entire Kemal ecosystem, run Crystal Weekly and Crystal Community, and write free books in Turkish and English. I can't find a job right now. So I'm going full time on Crystal Open Source. I need $1,000/month to keep doing this. If my work has helped you or your company, please consider sponsoring. 👉 github.com/sponsors/sdogruyo… Be part of Crystal's future. 💎 #crystallang

Sponsor @sdogruyol on GitHub Sponsors

Crystal Core Member. Creator of Kemal, the most popular Crystal web framework. Building gcry, the next GC for Crystal. Full time Open Source since 2015.

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A new release is out: Crystal 1.21.0 🚀 We've reached a major milestone with making Execution Contexts the default concurrency model. crystal-lang.org/2026/07/12/… Read more about the release at crystal-lang.org/2026/07/16/… #crystallang #release

Releasing Execution Contexts

Two and a half years ago, with the invaluable support from 84codes, we re-examined the multithreading model inherited from Crystal 0.28 (preview MT).

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Crystal Language retweeted
Serdar Dogruyol セド
@sdogruyolMay 28
Huge Milestone: There are now over 10,000 Crystal projects 💎📷 @CrystalLanguage #crystallang
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Check out this interview with Carl Hörberg of 84codes, where he explains why they chose Crystal to build LavinMQ – a great example of Crystal in production. youtu.be/C8kq3KoP97k?si=WMKw… #crystallang @LavinMQ @84codes
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A new Crystal release is out for version 1.20.0 Highlights: `@[TargetFeature]` annotation, new process spawn API, support for kernel TLS and io_uring. The latter requires execution contexts which is now in the final preview. Read more at crystal-lang.org/2026/04/16/…
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We’re gathering for a Crystal #Meetup in #Stockholm! Beta Ziliani from the Core Team and Carl Hörberg from LavinMQ will share insights and experiences of using #crystallang. Food, drinks, and tech talks - Feb 18th at Guldbaren. crystal-lang.org/events/2025…
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Crystal Language retweeted
Johannes Müller@JoMueFD14 Jan 2025
I'm giving a talk about #crystallang at #FOSDEM It's going to be an intro, but I'll try not to bore anyone who's already familiar with the language. Hope to see you there =) fosdem.org/2025/schedule/eve… PS. I'll bring some swag.
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Happy New Year, happy new release! 🎇 1.15.0 is out with a new, efficient event loop, support for MinGW-W64 and MSYS2, improvements for BSD platforms, and many more features. Watch out for the formatter changes, they'll likely affect your codebase! crystal-lang.org/2025/01/09/…

Crystal 1.15.0 is released!

We are announcing a new Crystal release 1.15.0 with several new features and bug fixes.

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And we have a new release: Crystal 1.14.0 🚀 Read about the highlights in crystal-lang.org/2024/10/09/… Happy Crystalling! #CrystalLang #release

Crystal 1.14.0 is released!

We are announcing a new Crystal release with several new features and bug fixes.

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Core Team member @ysbaddaden started toying with BLAKE3, trying to assess how much faster it was compared to SHA256 in Crystal… What started as a simple benchmark ended up in a discovery of a performance issue related to structs and its Ruby-based syntax. crystal-lang.org/2024/09/10/…
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We are thrilled to announce the release of Crystal 1.13.0 crystal-lang.org/2024/07/09/… You can now rescue module types! And there are a few improvements on parallelism. Happy Crystalling! #CrystalLang #release

Crystal 1.13.0 is released!

We are announcing a new Crystal release with several new features and bug fixes.

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Do you know why @LavinMQ can handle so many connections and process that many messages? There are several reasons, but one of them is because developers can understand the library code the application runs. crystal-lang.org/2024/05/22/… #performance #crystallang #lavinmq #programming

LavinMQ: Understanding code to get the best performance

Building LavinMQ in Crystal was an active choice, as maintaining control over the codebase was a high priority. A decade of learning has prioritized fast updates and easy bug fixes. At the same time,...

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Core Team member Johannes (@JoMueFd) will be presenting a talk about Crystal and its use for Rubyists at @helvetic_ruby 💎 Check it out at helvetic-ruby.ch/talks/#joha…
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We are thrilled to announce the release of Crystal 1.12.0 crystal-lang.org/2024/04/09/… It's a big release which brings progress on many fronts. Happy Crystalling! #CrystalLang #release

Crystal 1.12.0 is released!

We are announcing a new Crystal release with several new features and bug fixes.

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We relaunched crystal-lang.org with an updated design and a ton of improvements. 🎉🥳 Hope you like it! Read the anouncement: crystal-lang.org/2024/03/27/… #CrystalLang #website #relaunch

Crystal

Crystal is a general-purpose, object-oriented programming language. With syntax inspired by Ruby, it’s a compiled language with static type-checking. Types are resolved by an advanced type inference...

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We're reorganizing the sponsoring tiers in OpenCollective: crystal-lang.org/2024/03/25/… If you're a sponsor, read about the changes in the current tiers. If not, maybe consider contributing to help us make Crystal better? #CrystalLang
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