News

Releasing Execution Contexts
Julien Portalier
Project #multithreading

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).

Latest release Crystal 1.20.3
All release notes
Post Mortem: HTTP Request Smuggling Vulnerability
Julien Portalier
Technical #post-mortem #security #http

On 12 April 2026, we received a vulnerability report regarding an HTTP request smuggling vulnerability in HTTP::Server.

Official Linux ARM64 builds
Julien Portalier
Project #packaging

Finally, starting with Crystal 1.19 we provide official ARM64 builds

Crystal talk at FOSDEM 2026
Johannes Müller
Community #events #talk #community #foss #fosdem

Johannes is speaking about Crystal at FOSDEM 2026 in Brussels.

Wind of change (or maybe not)
Beta Ziliani
Community #people #team

Beta is stepping down from the lead position, which Johannes will take

More articles

Crystal Compass
Community #Crystal Compass #ecosystem #Manas.Tech
Margret Riegert joins the Core Team
Project #people #core-team
Imagining the future of Crystal together in Stockholm
Project Community #talk #84codes #ecosystem #events
New year, new member
Project #people #core-team
Crystal meetup in Stockholm
Community #events #talk #community #meetup
Crystal talk at FOSDEM
Community #events #talk #community #foss #fosdem
A new Event Loop for UNIX operating systems
Technical #feature #eventloop #concurrency #84codes
Let's hack together at OpenSource Global Hack Week!
Community #talk #hackathon #foss #beginner-friendly #84codes
The Power of Crystal: A language for humans and computers @ Helvetic Ruby 2024
Community #talk #ruby #helvetic-ruby #conference
Digging into struct initialization performance
Technical #language #performance
LavinMQ: Understanding code to get the best performance
Success #84codes
Website Relaunch
Project #website
New sponsoring tiers
Project #sponsors
The return of the Julien
Project #people #core-team
84codes and Manas partner to iron multi-threading support
Project #Manas.Tech #84codes #multi-threading #partnership #sponsors
Crystal: the lingua franca at Bright
Success
Windows support in Crystal 1.11
Technical #feature #windows #linking #interpreter
Bright and Manas partner together to create Crystal development tools
Project #Manas.Tech #Bright #partnership #sponsors #tooling #feature
Memories from CrystalConf
Project Community #events #crystalconf #berlin
A farewell and a (second) welcome
Project #people #core-team
Interview with contributor Remilia Scarlet
Community #people #project #interview
Windows support in Crystal 1.9
Technical #feature #windows #linking
Changes in the Steering Committee
Project #people #core-team
LLVM opaque pointer support has landed
Technical #feature #codegen #llvm
Reveal type in Crystal
Technical #howto #types
Heads up: Crystal is upgrading its Regex engine
Technical #feature #regex
Introduction: Mekhla Mukherjee, Community Manager
Project #people
Automating smart buildings with Crystal
Success
Welcome 2023!
Project #people #core-team
Latest news from the Crystal Team
Project
bdw-gc coroutines support
Technical #feature
Crystal's interpreter – A very special holiday present
Technical #feature
Preparing for Crystal 1.2
Project
Community moderators
Project
Installing specific versions of Crystal's binary packages
Technical #packaging
IRC channel moved to Libera Chat
Project
Behind the scenes of the past two months
Project
Announcing new apt and rpm repositories
Technical #packaging
Announcing Crystal 1.0 Conference
Community #community #events
Crystal Core Team Announcements
Project
Raw Crystal 2020
Community #community #events
Organising a Crystal conference in 2020
Community #community #events
Announcing new apt and rpm repositories
Technical #packaging
Preparing our shards for Crystal 1.0
Technical
Shards 0.12.0 released!
Community #ecosystem
Towards Crystal 1.0
Project
Crystal powered dashboards on the trucks of the future
Success
Alpine-based Docker images
Technical #packaging
Introducing shardbox.org
Community #ecosystem
Parallelism in Crystal
Technical #feature
Genome analysis powered by Crystal
Success
Snapcraft Summit Montréal
Community #events #packaging
Formatting pretty numbers for humans
Technical #feature
Using Crystal to power the IOU economy
Success
Watch: Run, change, build, repeat
Technical #misc
Using CircleCI 2.0 for your Crystal projects
Technical #devnotes
Crystal Automated Release
Technical #devnotes
Lucky with Crystal - Fewer Bugs, Better Performance, Incredible Productivity
Community #ecosystem
Amber - Crystalizing Rails and Phoenix
Community #ecosystem
Top 5 Reasons for Ruby-ists to Use Crystal
Community #howto
This is not a new year’s resolution
Project
Crystal Survey 2017 Results
Community
Diploid and Crystal
NeuraLegion and Crystal
Success
Launching the 2017 State of Crystal Survey
Community
Announcing Crystal CodeCamp SF2017
Community #community #events
State of Crystal at 0.21
Project
The Charly programming language
Success
Crystal new year resolutions for 2017: 1.0
Project
INSERT INTO shard VALUES ("crystal-db")
Community #ecosystem #database
A story of compromises and types
Technical #language #types
Fibonacci benchmark
Technical #performance
Split the repo!
Project
Heroku Buildpack
Technical #tooling
Buenos Aires Crystal Meetup
Community #community #events
The future of Crystal
Project
Crystal tools
Technical #compiler
It's a typeof magic
Technical #language #types
Auto
Technical #April's Fools #macros
Internals
Technical #language #codegen
Another language
Technical #language #types
Type inference rules
Technical #language #types
Garbage Collector
Technical #language
Good bye Ruby Thursday
Technical #compiler
Type inference (part 1)
Technical #language #types
to_proc
Technical #language
Happy birthday, Crystal!
Technical #language #project
Null Pointer Exception
Technical #language
Hello World
Technical #language