trivago runs a GraphQL gateway handling 9,000+ req/s per subgraph. After migrating to GraalVM Native Image, they: — eliminated warm-up — reduced replicas from 43 to 12 — cut CPU usage Learn more about their migration process and recommendations: medium.com/graalvm/insi...

I'm starting at Datadog today!

X is a fascist propaganda network by design. It‘s long past time to boycott X. It’s unfathomable no one has even tried to organize a boycott.

Just received a Most Notable Paper Award for our paper “Cross-language compiler benchmarking: are we fast yet?” published at the Dynamic Languages Symposium 2016. Congratulations to my co-authors @stefan-marr.de and Hanspeter Mössenböck!

GraalWasm just got faster! 🔥 The new threaded interpreter delivers significantly better interpreter performance. In interpreter benchmarks, total execution time is reduced by 5-40%! Details: github.com/oracle/graal...

I benchmarked which language works best with Claude Code. Ruby, Python, and JavaScript came out cheapest, fastest, and most stable! See my article in detail: dev.to/mame/which-p...

New research paper out: **Contiguous Zero-Copy for Encrypted Transport Protocols**. This paper explains we may have got the integration of symmetric cryptography into networking protocols wrong for efficiency. But we can fix it simply by ... reversing everything. A thread dl.acm.org/doi/epdf/10....

We’re pleased to announce that TruffleRuby 33.0.1 is now available. This is a bug fix release that notably adds support for structured event reporting in Rails 8.1 (and any other usage of Fiber storage) along with other compatibility work. More details at: github.com/truffleruby/...

Rubyfmt 0.12 is out! This release is a big deal. We entirely removed ripper and replaced it with Prism. This means Rubyfmt no longer needs to compile against Ruby at all. This work wouldn't have been possible without the hard work of Reese, and as a bonus treat we now have: rubyfmt.run

Just wanted to share that @rubyevents.org looks really good, I recently found the page about TruffleRuby-related talks: www.rubyevents.org/topics/truff... and of course my own profile page: www.rubyevents.org/profiles/ere...

Joined the #Ruby dev meeting this morning at 7:30am local time, lasted until 10am, eating some ramen now to recover 😅

Very cool research made it into TruffleRuby!

This is a huge release for TruffleRuby. It’s our first under our new org. If you’ve been hesitant about contributing because of the CLA, please note that we no longer have one. We can also release more frequently so please report bugs or open PRs.

TruffleRuby kicks off the year with a new website, a new release, and a blog post to go with it! 🎉 truffleruby.dev/blog/truffle... Many changes: * New versioning * Thread-safe Hash * No system dependencies anymore * Installs in 2 seconds * Development is now fully in the open

Last year I had the pleasure to review and contribute to this paper by @ko1s.bsky.social: atdot.net/~ko1/activit... It's a tiny framework to partial evaluate AST interpreters written in C. The paper uses the example of a minimal subset of Ruby called naruby (Not A Ruby).

Had a good inspiring break? Tell us about your latest ideas on language implementations, compilers, and VMs: 2026.programming-conference.org/home/MoreVMs... Can be just a short abstract, or something slightly more technical if preferred. Deadline in about a week, Jan 12th.

Just merged a gargantuan PR: 340k lines & 3000 files changed, 128 comments 🎆🚀 It's the import of Ruby 3.4 in TruffleRuby: github.com/truffleruby/...

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

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...

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...

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.