ZJIT is available starting in Ruby 4.0! Please try it out on your test suite, maybe in a staging environment, and let us know how it goes! railsatscale.com/2025-12-24-l...

#rubyrelease30th I’d like to introduce Aliki, RDoc and docs.ruby-lang.org’s new theme 😄 railsatscale.com/2025-12-22-i...

Finally, www.ruby-lang.org/en/ has a new design.

We were very proud to present @marcoroth.dev with the Rails Luminary Award 2025. And yes, I was on a secret mission to Zurich 😀. rubyonrails.org/2025/12/17/m...

I'm really happy to see @marcoroth.dev receive the 2025 Rails Luminary Award! 🎉 He’s done so much for the Rails ecosystem and the Ruby community. Huge congrats, Marco! 🙌 And it's great to have @fxn.bsky.social and @amandabrooke.bsky.social around. #rails #RubyOnRails #ReActionView #herb

One thing I'm really excited about in Ruby 4.0 is that object allocation is going to get a nice speed boost

concurrent-ruby 1.3.6 is released: github.com/ruby-concurr... It automatically prunes unused threads of a thread pool even when no new work is queued, migrates away from the deprecated "non-typed data" C API and includes several bug fixes.

Inverted Catenaries xkcd.com/3176/

If anyone is looking for an easy pure-Ruby contribution to TruffleRuby, here is one: github.com/truffleruby/...

It is time. I was going to hold off, release in bulk. When all were ready. Stina suggested an advent calendar. And I try to heed her wisdom. Goatcember begins! Marc Lainez gave us this fantastic start on his teams work on The Nerves Car. goatmire.bold.video/v/ywpqe #elixirlang

Could it be any clearer Trump is just Putin's puppet? Or that the plan is just to make it easier for Russia to attack Ukraine the next time? How can US people live with themselves knowing their president is just the puppet of a serial genocide maker? www.theguardian.com/world/2025/n...

Extended an existing doc to explain Ruby’s VM stack, which I learned from my ZJIT work: docs.ruby-lang.org/en/master/co...

I'm making another attempt to get a `deep_freeze` method added to Ruby. Core folks have rejected proposals for years, until Ractor came along and we got basically the same feature in `make_shareable`. But deep freezing should be its own feature. bugs.ruby-lang.org/issues/21665

Announcing ractor-shim, a new gem that reimplements Ractor on top of Thread & Queue: github.com/eregon/racto... This gem provides the full Ruby 3.5 Ractor API (Ractor::Port, Ractor#{join,value,monitor}, etc) on TruffleRuby, JRuby, and CRuby 2.7 to 3.4.

pkl-lang.org migrated from a ANTLR parser to manual parser, result: twice as fast. From Islon Scherer at the #GraalVM Community Summit

I wrote about some of my thoughts on the lessons we can learn from the RubyGems situation and how we can move forward. blog.peterzhu.ca/open-source-...

Can We Know Whether a Profiler is Accurate? Spoiler: yes we can! But it took us figuring out a way to work around the fundamental observer effect. stefan-marr.de/2025/10/can-... If you're at SPLASH, don't miss our talk at VMIL today and at OOPSLA on Saturday!

I tried to explain why I don't believe the recent accusations toward my former teammates, as well as how the Ruby and Rails Infra team at Shopify operates and why it can be trusted. byroot.github.io/opensource/r...

Every few months now I re-read this "Who Goes Nazi?" piece from 1941 and am blown away by how it captures the people we are dealing with 80 years later. harpers.org/archive/1941...

First Day: A New Chapter at the JKU It's Wednesday. Is this important? It's my first day in a new position. So, perhaps the real question is: what's going to be important to me from now on? stefan-marr.de/2025/10/firs...

Having met with both sides on the current RubyCentral/RubyGems situation, here's my take: - RubyCentral have managed this exceptionally poorly in many ways including removing literally the most active member of the RubyGems organisation by mistake who has declined to return

Hey, #ruby folks! I've been one of the #RubyGems maintainers for the last decade. Ruby Central has forcefully taken control of the RubyGems organization on GitHub, the `rubygems-update` and `bundler` gems on rubygems[.]org, and more. You can read the details here: pup-e.com/goodbye-ruby...

Running native extensions in parallel is a huge performance boost. Running a large internal Rails application, we saw performance roughly double. Very workload dependent, of course, but all of the major DB adapters are implemented as native extensions. We also added support for the blake3-rb gem.

GraalVM 25 released today! 🎉 My favorites this release👇

GraalVM 25 has a lot of great new features for native compilation: ✅ Better developer experience 👩‍💻 ✅ Simplified migration 🚀 ✅ Even faster and smaller executables with ML 🤖 ✅ Enhanced security 🛡️ ✅ New tooling 🛠️ Here are my favorite new @graalvm.org features:

TruffleRuby 25.0 is released! 🚀🎉 It can now run native extensions in parallel, just like Ruby code already ran in parallel in Threads on TruffleRuby! It also features many compatibility improvements and notably support for custom Digest algorithms. github.com/oracle/truff...

We have started the tedious and destined-to-always-lag-behind work of documenting #curl's view of the OpenSSL forks: https://github.com/curl/curl/wiki/OpenSSL-forks

Fighting LLM-generated slop with LLM, mmh I wonder how well that works: github.com/github/ai-mo...

Here we go! Had a great time learning about this with @tenderlove.dev bernsteinbear.com/blog/linear-...

How we made JSON.stringify more than twice as fast | Discussion

How we made JSON.stringify more than twice as fast https://lobste.rs/s/ueocpa ##browsers ##performance

Beyond performance work, I deprecated a bunch of APis in the JSON gem, and added others, so I figured it would be a good occasion to talk about API design: byroot.github.io/ruby/json/20...

This is excellent. In three minutes she explains how democracies become dictatorships. It's happened so many times, yet in each country, most people said, 'it can't happen here'

We ran a randomized controlled trial to see how much AI coding tools speed up experienced open-source developers. The results surprised us: Developers thought they were 20% faster with AI tools, but they were actually 19% slower when they had access to AI than when they didn't.

It's happened: the trimodal nature of software engineering compensation made it to the Economist! Disappointingly though, they did not link to the original article (they never do AFAIK), they redraw the image, and do not call it trimodal. Feels like "ripping off" my research, not gonna lie.

"jemalloc Postmortem" jasone.github.io/2025/06/12/j...

This is incredible

We are working on a new big project for @graalvm.org — Project Crema: github.com/oracle/graal.... It will lift Native Image's default closed-world assumption by allowing dynamic loading and execution of classes at run time. Stay tuned for updates!

Bridge Types xkcd.com/3097/

"It's a very bulky new neighbour but it will soon go away" 😆

No more Faster CPython at Microsoft 😶 www.linkedin.com/posts/mdboom...

TruffleRuby can now run C/native extensions in parallel, just like Ruby code runs in parallel in Threads on TruffleRuby! Native extensions need to opt in with rb_ext_ractor_safe(true) or rb_ext_thread_safe(true). Many gems already do that. See github.com/oracle/truff... for more details.

Thank you all for writing amazing posts so that I can read them and learn ❤️ bernsteinbear.com/blog/pl-writ...

"Masked security forces captured an opposition leader in the coastal province of New Jersey as regime officials continue their months-long crack-down against pro-democracy elements in the embattled United States. The arrest comes as the regime issued calls for summary detentions without trial."

TinyBits: A new schema-less binary serialization format. Fast to encode, fast to decode and generally smaller output than all other schema-less formats. Currently available as a preview for C and Ruby. A Python module is also in the works. oldmoe.blog/2025/05/05/s...

My thoughts on the new #Ruby namespaces (bugs.ruby-lang.org/issues/21311) in one sentence: Sub-interpreters are similar to Namespace + Ractor but with proper isolation, full compatibility, linear scaling and clear semantics. Compatibility is a key argument here, Ractor can't use most gems.

New blog post: “Contributions to ruby/spec” eregon.me/blog/2025/05...

My teammate Alexandre Terrasa wrote a great post about using inline RBS with Sorbet. We’ve been slowly adopting it at Shopify. And while we’re still improving Sorbet and all the supporting projects, it’s already working well! railsatscale.com/2025-04-23-r...