JRuby Dev Team @jruby
Operated by @headius, @tom_enebo, @hiro_asari jruby.org In your Java Joined September 2008-
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At the end of my post on JRuby and JDK 25 startup time features, I teased a bit of the unreleased improvements from Project Leyden. It turns out the latest commits improve startup time even more, so it seems worth posting a quick follow-up! reddit.com/r/ruby/comment…
New post: JRuby and JDK 25: Startup Time with AOTCache Let's take a look at JRuby's startup time journey, all the way up to using JDK 25's AOTCache and Project Leyden features coming to a JDK near you soon. blog.headius.com/2025/09/jruby-…
JRuby 9.4.14.0 is released! We've updated a bunch of the standard library (including "cgi" to fix a couple of CVEs), fixed a few memory leaks and a bunch of compatibility issues, and generally stabilized things. Upgrading is recommended! jruby.org/2025/08/28/jru…
JRuby 10.0.2.0 is released! This is a small release to fix an ArgumentError regression in JRuby 10.0.1.0 plus a few other small fixes. Recommended upgrade for all, but let us know if you run into any issues! jruby.org/2025/08/07/jru…
We have just released JRuby 10.0.1.0, our first update to JRuby 10! There's dozens of patches including full support (finally) for Zeitwerk and a bunch of Ruby 3.4 language fixes. Upgrade today and let us know how it goes! jruby.org/2025/07/17/jru…
We have released jruby-maven-plugins 3.0.6, updating JRuby to 9.4.13.0 along with several other improvements. But more exciting: Warbler is BACK! We've updated it for latest JRuby and dependencies and it's running green in CI. Time for feature requests! github.com/jruby/warbler/…
FYI: now that Ubuntu 20.04 is EOL, future releases of the JRuby Docker image will be based on Ubuntu 22.04. This will take effect with releases 9.4.14.0 and 10.0.1.0, whenever they happen. See github.com/docker-library…
JRuby 9.4.13.0 is released! We have fixed several user issues, including a slow leak in Java interface implementation, a possible deadlock between JIT and main threads, and backported launcher improvements from JRuby 10! jruby.org/2025/06/10/jru…
this week on the unikernel application spotlight we check out @jruby youtube.com/watch?v=72wlDv… real threads && jvm interop - congrats on 10.x release and 24 yrs! @headius
That's right... JRuby is the only Ruby with a fully-portable, all-in-one distribution that works with Bazel's secure, closed-world builds. You want secure, stable, scalable Ruby, you use JRuby! Thanks for the chat at @rubykaigi!
That's right... JRuby is the only Ruby with a fully-portable, all-in-one distribution that works with Bazel's secure, closed-world builds. You want secure, stable, scalable Ruby, you use JRuby! Thanks for the chat at @rubykaigi!
One of my benchmarks for learning German is being able to construct Alle Kinder jokes, about whatever topic I happen to be thinking about. Still usually uncertain if I have the exact right words. Alle Kinder verwenden @jruby, außer Bill, der keine Leistung will.
Security advisory: We have released jruby-openssl gem 0.15.4, jruby 10.0.0.1, and jruby 9.4.12.1 to address CVE-2025-46551, disabled hostname verification by default. We recommend that all users upgrade! cve.org/CVERecord?id=C… jruby.org/2025/05/07/jru… jruby.org/2025/05/07/jru…
Seems like a few folks didn't think my 2D bar chart was "beautiful", so let's kick it up a notch with 3D, SVG, and PDF generation using the same JFreeChart family of libraries! blog.headius.com/2025/05/3d-cha…
It's finally here! JRuby 10 has been released with support for Ruby 3.4 (including 3.2 and 3.3 updates as well). Minimum Java version has been bumped up to Java 21, allowing us to support more modern JVM features. Begin your migration today! jruby.org/2025/04/14/jru…
It's almost time! I've just published my first post on JRuby 10, "Part 1: What's New". More posts will follow in the coming weeks, but JRuby 10 itself should be generally available before my RubyKaigi talk next week! buff.ly/IUQ1ixS
We have released jruby-launcher 2.0! This version eliminates the old C++ code in favor of two options: * On Unix systems, just exec the jruby.sh script. * On Windows, a new Rust-based exe is coming soon. Let us know if you have any issues: buff.ly/nLmlSh3
JRuby 10 HEAD builds are now live in GitHub Actions setup-ruby and for any local Ruby installers that depend on jruby-dev-builder's jruby-head packages! Fingers crossed it doesn't cause too many problems, but let us know right away if something goes awry!
It's almost time! JRuby 10 is approaching release, and toward that end we will be switching JRuby master from the 9.4 line to the 10.0 line this week. The "jruby-head" build from GHA "setup-ruby" action will remain 9.4 for now, but it's time to start testing with JRuby 10!
New post: Boosting JRuby Startup with AppCDS and AOT caching buff.ly/4jUEKJc
JRuby 9.4.12.0 has been released with two important fixes: a thread-safety patch for recent Class#subclasses logic and an update for jar-dependencies to fix issues parsing Maven output on Java 9+. Let us know if you run into any new issues! buff.ly/4hQOCSh
Charles Oliver Nutter @headius
14K Followers 214 Following JRuby guy, Java, Ruby, OSS business liaison. Find me: @[email protected] or @headius.bsky.social Sponsor me: https://t.co/G5oUTdTJqA
Chris Seaton @ChrisGSeaton
4K Followers 2K Following Researcher at @Shopify // PhD in Ruby // Founder of @TruffleRuby // Squadron Leader of the Cheshire Yeomanry 🦊
Benoit Daloze @eregontp
2K Followers 454 Following Rubyist, Researcher at Oracle Labs, part of the @GraalVM team, @TruffleRuby lead. Expressed opinions are my own. Moved to https://t.co/71GpzI094S
Jeremy Evans @jeremyevans0
4K Followers 51 Following Principal Software Engineer @UbicloudHQ. Ruby Committer. Author of "Polished Ruby Programming". Maintainer of many ruby gems. OpenBSD ruby ports maintainer.
Hiroshi SHIBATA @hsbt
7K Followers 191 Following @[email protected]: A member of Ruby core/RubyGems/Bundler team, Administrator of *.ruby-lang.org, https://t.co/rdx69wmQZK, Fellow at ANDPAD, Inc.
Kevin Menard @nirvdrum
1K Followers 867 Following Staff Engineer at @Shopify. Working on YJIT and @TruffleRuby. Mastodon: @[email protected]
Miguel de Icaza ᯅ�... @migueldeicaza
97K Followers 5K Following Fun Stack Vibing. Started Xamarin, Mono, Gnome; was MSFT/.NET/Xamarin/Mono/VSMac/AI https://t.co/QkbDDWMXRf @migueldeicaza.bsky.social
Stan Lo @_st0012
2K Followers 689 Following Taiwanese 🇹🇼 in 🇬🇧 / @Shopify mostly working on Ruby tooling / IRB, Reline, ruby-lsp, ruby-lsp-rspec, RDoc / conference speaker / @st0012.dev 🦋
tom_enebo @enebo@mast... @tom_enebo
1K Followers 250 Following Co-lead of JRuby. Ruby Hero. Java. Rust. Running. Beer.
RubyConf Thailand @rubyconfth
669 Followers 926 Following Join us the 30th JAN - 1st FEB, 2026 in Bangkok, Thailand to talk all things Ruby! A community-driven conference.
Tim McNamara @timClicks
24K Followers 3K Following On the planet to build a better planet. Software person, kind of into Rust and creative coding. Author of Rust in Action (https://t.co/qgWenxBkeP).
Lucian Ghinda @lucianghinda
5K Followers 3K Following Product Engineer, Ruby on Rails Developer Curator of @shortrubynews Trainer at https://t.co/XFRrJeCJ6K
Tobias Pfeiffer @PragTob
4K Followers 998 Following Likes people. Teamplayer, Open Source Enthusiast, Software Developer, Benchmarker, TDDer, Speaker. Ruby, Elixir, JavaScript. Runs @rug_b. Loves green.
Bozhidar (Bug) Batsov @bbatsov
9K Followers 888 Following Hacker. Lover of parentheses. Emacs fanatic. Author of RuboCop, CIDER, Emacs Prelude and Projectile. Maintainer of nREPL. Not the best, but pretty good.
Kenned @kenbme_
0 Followers 16 Following
Anusha Santhosh @AnushaKovi
7 Followers 180 Following
Robin Ciubotaru @rocasoftware
0 Followers 6 Following
sudo rm -rf --no-pres... @Jeyso215
3K Followers 7K Following 👊Privacy Guardian | 🌍 Cyber Freedom Advocate | 🇺🇸 🚫📵Anti-Surveillance | 💪Empowering Data Sovereignty
Donlon McGovern @DonlonMcGovern
1 Followers 82 Following
Jon 'Mike' Schlottig @mike_FknSchlott
4K Followers 5K Following People are already sick of AI. Some debacles? Sure. But it's not the future. It's right now. Adapt or Die. Need help? LEVERAGEAI: Integrity Meets Innovation. LG
On Code @OnCodeDao
54 Followers 620 Following Welcome To OnCode The Intersection Where Visionaries, Founders, Developers, Engineers & Venture Capital Meet. #OCD Community
Matt Quinn @mjquinn_ca
1 Followers 8 Following Toronto-area programmer. Ruby, Rust, web, performance & observability.
Henry Stehr @HenryStehr18367
7 Followers 165 Following Recruiting webshell engineers to penetrate websites, with a monthly salary of up to $100,000. If interested, please contact https://t.co/AOikgITxCC
Aggrey @Aggrey908
0 Followers 31 Following
Rdbo @rdbodev
114 Followers 161 Following Author of - Sigma Linux: https://t.co/jHLMWaCXpk - libmem: https://t.co/j91Z12wKZ9 much more...
|7eter l-|. l3oling -... @galtzo
2K Followers 5K Following RubyGems: oauth, oauth2, omniauth-identity, flag_shih_tzu, sanitize_email… BSKY - https://t.co/HcLvPOkcKD Rubyist - https://t.co/YQhvG2f8XM
Alexandre Barret @alxbarret
74 Followers 191 Following 🇫🇷 Web developer, in love with Ruby, keeping things simple and a good refactoring session. check out https://t.co/RJ4NbqPXhD
Willian Tenfen Wazile... @willian_tenfen
10 Followers 38 Following
Rishi Reddy @rishii_reddyy
2 Followers 91 Following
YJ Hou🇨🇳 @Harx2018
2 Followers 138 Following
Headius Enterprises @HeadiusEnts
20 Followers 4 Following Headius Enterprises is the first company to offer professional support for JRuby users! Contact us to learn more!
3llideas @3llideas
125 Followers 222 Following Agencia eCommerce, especialistas Amazon AWS, Solución BI Looker, Software Factory y especialistas en soluciones empresariales Sage
Tatiti @Tatitibw6uXtr
99 Followers 7K Following
Abbas @A07096326
98 Followers 895 Following
Leonardo Mezu Lobato @leonmezulobato
502 Followers 2K Following I do code 👨🏾💻 Random and honest opinions about spread interests, fitness nerd wannabe.
Woteight @WoteightEXz
79 Followers 5K Following
Jānis Baiža @jbaiza
337 Followers 281 Following
Francisco mardonio Du... @MardonioD30843
0 Followers 15 Following
Ashwin Jayaprakash @ashwinjay
237 Followers 4K Following Falling into the future at light speed. (Any opinions expressed are my own)
ervinismu @ErvinIsmu
65 Followers 607 Following
kevwil69 @kevwil69tism
54 Followers 48 Following Engineer, amateur photographer, overthinker. 🇺🇸 Colorado is a failed communist state. 😡
Nuan Standard @NuanStanda6085
103 Followers 592 Following
t0t3nk0pf @AndrsFe01234827
160 Followers 2K Following
Sebastian @Oliva2024
1K Followers 6K Following And you will know the truth, and the truth will set free you.
Tarek Boutefara @t_boutefara
93 Followers 447 Following
Heru Fancyson @heru_fancyson
53 Followers 299 Following Hidup Adalah Sebuah Kematian Yang Tertunda. Valsav #valsav
Daniel (Lobão / D. W... @lobaorn
444 Followers 2K Following Backend Engineer at Trustly | Java and JVM enthusiast. Performance and modernization expert. Run it newer, better, faster, simpler, cleaner. Build it too.
松永 @matsud224
294 Followers 677 Following
satoru_unix @SatoruUnix
1 Followers 155 Following
Dr. Shartstein @dr_shartz
0 Followers 17 Following
KB @feralKB
367 Followers 142 Following
Pedro Girardi @pedrorgirardi
250 Followers 1K Following
Charles Oliver Nutter @headius
14K Followers 214 Following JRuby guy, Java, Ruby, OSS business liaison. Find me: @[email protected] or @headius.bsky.social Sponsor me: https://t.co/G5oUTdTJqA
Chris Seaton @ChrisGSeaton
4K Followers 2K Following Researcher at @Shopify // PhD in Ruby // Founder of @TruffleRuby // Squadron Leader of the Cheshire Yeomanry 🦊
Jeremy Evans @jeremyevans0
4K Followers 51 Following Principal Software Engineer @UbicloudHQ. Ruby Committer. Author of "Polished Ruby Programming". Maintainer of many ruby gems. OpenBSD ruby ports maintainer.
tom_enebo @enebo@mast... @tom_enebo
1K Followers 250 Following Co-lead of JRuby. Ruby Hero. Java. Rust. Running. Beer.
Vladimir Dementyev @palkan_tula
5K Followers 362 Following Building web products and dev tools with @EvilMartians 👽 Powering up real-time web apps with @any_cable 🔌
Headius Enterprises @HeadiusEnts
20 Followers 4 Following Headius Enterprises is the first company to offer professional support for JRuby users! Contact us to learn more!
Akira Matsuda @a_matsuda
9K Followers 2K Following Rails committer. Ruby committer. amatsuda on GitHub. Creator of Kaminari. Founder of Asakusa.rb. Chief Organizer of RubyKaigi. Ruby Hero / Rails Luminary. 松田 明
Baq Haidri @baqhaidri
133 Followers 1K Following Just checking in to see what condition our condition is in. she/her
Ola Bini - (@ola@info... @olabini
20K Followers 313 Following Shugyosha. Paranoia principal, privacy developer. Programming language nerd. In a previous life, I was a JRuby core developer and language designer - he/him
Mark Reinhold @mreinhold
35K Followers 899 Following Chief Architect, Java Platform Group, Oracle · Views are my own · 🐘 https://t.co/K7mZtsmCoU
Timothy Hunt @stormguardian
43 Followers 209 Following
Alex Tambellini @atambo
60 Followers 166 Following
Karol Bucek // k@res @kbucek
259 Followers 348 Following accidental (#oss) programming, seeking (#jvm) asylum (through #jruby), lifelong learning and anarchy
JRubyConf EU @JRubyConfEU
351 Followers 158 Following JRubyConf's European Edition. July/August 2015 in Berlin. Presented as part of @eurucamp 2015.
JRubyConf @JRubyConf
600 Followers 85 Following JRubyConf is back in Europe in 2014. August 1, Potsdam/Berlin, Germany. Come learn how to bring Ruby to the Java platform. Follow @JRubyConfEU for more details
JRubyKaigi @JRubyKaigi
38 Followers 25 Following JRubyKaigiはJRubyユーザとそうでない人のためのカンファレンスです。 JRubyKaigi will be held on 15 Jul 2011 in Tokyo Japan.
Nick Sieger [日空] @nicksieger
2K Followers 645 Following Longtime purveyor of artisanal, hand-crafted shell scripts. Yes-and'ing all the ideas. He/him #BlackLivesMatter #GeorgeFloyd #ICantBreathe
Yoko Harada @yokolet
886 Followers 200 Following Polyglot, JVM language lover, Yay JRuby! Yes, ClojureBridge! Full stack web developer, sending love to Machine Learning
あさり 🗣🇯�... @hiro_asari
2K Followers 628 Following Speaks fluent 🇯🇵 🏴, learning 🇪🇸 🇫🇷 Catalan 🇵🇹 🇮🇹 🇩🇪 🇮🇸. He has a finite Erdős number.
Hiroshi Nakamura @nahi
2K Followers 182 Following CTO and VP Engineering at https://t.co/BTxj8KdhCY. OSS enthusiast. Information Security Specialist. Tweets are my own.
Tim Felgentreff @timfelgentreff
509 Followers 313 Following Graal Python implementation lead at Oracle Labs. Opinions are my own.Trends for United States
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