--- title: "TruffleRuby 33, Ruby 4.0.1, and Ruby 3.2.10" publication: "Ruby Weekly" issue: 783 published_at: "2026-01-15" canonical_url: "https://rubyweekly.com/issues/783" --- Plus drawing cities with Ruby, how Ruby is an efficient language for LLMs, and more. | #​783 — January 15, 2026 [Read on the Web](https://rubyweekly.com/issues/783) Together with [![AppSignal logo\](https://res.cloudinary.com/cpress/image/upload/c_fill,g_auto,e_trim,w_700,h_120/e_make_transparent/co_white,e_outline:7/lme8p344dw1aodshz9px.png)](https://www.appsignal.com/?utm_source=newsletter&utm_medium=paid&utm_campaign=rubyweekly&utm_term=1-15&utm_content=primary) Ruby Weekly [![\](https://res.cloudinary.com/cpress/image/upload/w_1280,e_sharpen:60,q_auto/ijbzjwzbpdtzh4efkkxy.jpg)](https://truffleruby.dev/blog/truffleruby-33-is-released) [TruffleRuby 33: The High Performance, GraalVM-Based Ruby Implementation](https://truffleruby.dev/blog/truffleruby-33-is-released) — Healthy languages have multiple implementations, and TruffleRuby, originally created by the late [Chris Seaton](https://chrisseaton.com/), is celebrating its 13th birthday with both a major release and [new web site](https://truffleruby.dev/). v33 boasts it's _‘the fastest and easiest Ruby to install'_ – a claim I just successfully tested. The TruffleRuby Team [![\](https://res.cloudinary.com/cpress/image/upload/c_limit,w_480,h_480,q_auto/copm/c6754d13.png)](https://www.appsignal.com/?utm_source=newsletter&utm_medium=paid&utm_campaign=rubyweekly&utm_term=1-15&utm_content=primary) [Start Fixing Bugs Faster with AppSignal](https://www.appsignal.com/?utm_source=newsletter&utm_medium=paid&utm_campaign=rubyweekly&utm_term=1-15&utm_content=primary) — AppSignal gives Ruby developers the tools they need to fix bugs, track performance issues, and ship with confidence. Easy to set up, a joy to use, and built for teams that care about their code. [Start your free trial today, no credit card required](https://www.appsignal.com/?utm_source=newsletter&utm_medium=paid&utm_campaign=rubyweekly&utm_term=1-15&utm_content=primary). AppSignal sponsor [Ruby 4.0.1 Released](https://www.ruby-lang.org/en/news/2026/01/13/ruby-4-0-1-released/) — A minor update to Ruby 4.0, including a fix to a regression in `Kernel#sleep`, as well as a few [smaller bugfixes.](https://github.com/ruby/ruby/releases/tag/v4.0.1) Future releases (4.0.2, 4.0.3, etc.) are expected every two months from here on. Takashi Kokubun 💡 [Ruby 3.2.10](https://www.ruby-lang.org/en/news/2026/01/14/ruby-3-2-10-released/) has also been released applying CVE fixes and resolving some OpenSSL 3.6.0 related issues. 3.2 will go 'end of life' in March, however, so you're recommended to upgrade to Ruby 3.3/3.4 soon. **⚡️ IN BRIEF:** - [_Ruby Central_ released a substantial 'annual report'](https://rubycentral.org/support/) covering its work across 2022-2024. It goes into a lot of depth and paints a good picture of what Ruby Central actually does. - [Charles Nutter reports](https://bsky.app/profile/headius.bsky.social/post/3mcdp7cufzy2r) JRuby 10.1 is 'just a few dozen tests away' from being Ruby 4.0 compatible – fantastic news! - 🇯🇵 [RubyKaigi 2026](https://rubykaigi.org/2026/), taking place in Japan this April 22-24, has [extended its call for papers](https://cfp.rubykaigi.org/events/2026) by a week – it closes this Sunday. [Portable `mruby` Binaries with Cosmopolitan](https://katafrakt.me/2026/01/04/mruby-cosmo-compilation/) — Let’s say you want to use `mruby` as a way to create standalone executables and have them run across numerous systems: [mruby 3.5](https://github.com/mruby/mruby/blob/master/NEWS.md)’s new Cosmopolitan Libc support comes to the rescue! Paweł Świątkowski 🌐 [Ruby Can Draw Cities Now](https://rubystacknews.com/2026/01/09/ruby-can-draw-cities-now/) — An initial look at using [libgd-gis](https://github.com/ggerman/libgd-gis), a libgd-powered way to render maps and GeoJSON layers from Ruby. Giménez Silva Germán Alberto [Build a Feature Flag System in 50 Lines with `Rails.app.creds`](https://codewithrails.com/blog/rails-feature-flags-credentials/) — Feature flags that are version-controlled, easy to override in development, and don’t require another service to manage. Code with Rails [🤖 Plan Your Rails Upgrade with FastRuby’s AI-Powered Tool in Minutes](https://go.fastruby.io/mq8) — In a few clicks, know what it takes to upgrade your Rails app. Low on time? Ship your upgrade with [FastRuby’s Bonsai team](https://go.fastruby.io/ugu). FastRuby.io | AI-Powered Roadmap sponsor 📄 [Find the Last Matching Element with `rfind`](https://andycroll.com/ruby/find-the-last-matching-element-with-rfind/) – One of Ruby 4.0’s new features. Andy Croll 📄 [Nested Forms Without `accepts_nested_attributes_for` in Rails](https://railsdesigner.com/nested-forms-without-accepts-nested-attributes/) Rails Designer 📄 [Monitoring LLM Usage in Rails with RubyLLM::Monitoring](https://sinaptia.dev/posts/monitoring-llm-usage-in-rails-with-rubyllm-monitoring) Patricio Mac Adden 📄 [Building a File Deduplication System with Active Storage](https://codewithrails.com/blog/activestorage-deduplication/) Code with Rails 🛠 Code & Tools [![\](https://res.cloudinary.com/cpress/image/upload/w_1280,e_sharpen:60,q_auto/wkhwdvr4ila4dwuolp8o.jpg)](https://socketry.github.io/protocol-url/guides/getting-started/index.html) [Protocol::URL A New Way to Parse, Manipulate and Construct URLs](https://socketry.github.io/protocol-url/guides/getting-started/index.html) — A modern clean, standards-compliant API for working with URLs according to RFC 3986. Tidy and well documented. Samuel Williams 🖼️ [FastResize: A High Performance Image Resizing Library](https://github.com/tranhuucanh/fast_resize) — With the boast of being _‘the fastest image resizing library on the planet’_, I had to give this a try. It supports resizing JPEG, PNG, WebP and BMP in a variety of ways and worked well in my own testing. Tran Huu Canh [Your 90% Test Coverage Is Hiding Untested Methods](https://undercover-ci.com) — Shipping AI code? Undercover warns you which methods lack tests, right in your Ruby PRs. Free for open source. Undercover CI sponsor 🤖 [RubyLLM 1.10.0: The Cross-Provider LLM API for Ruby](https://github.com/crmne/ruby_llm/releases/tag/1.10.0) — A significant release for the popular cross-provider LLM API that brings first-class extended thinking across providers, Ruby 4.0 support, full Gemini 3 thinking-signature support, and more. Carmine Paolino et al. [httplog 1.8.0: Log Outgoing HTTP Requests in Ruby](https://github.com/trusche/httplog) — Handy for debugging API integrations or just to get a feel for what’s going on under the hood. Hooks into HTTP, HTTParty, Net::HTTP, OpenURI and others. Thilo Rusche - ⏩ [Ruby Next v1.2](https://github.com/ruby-next/ruby-next) – Transpiler and polyfills to use modern Ruby syntax and APIs on older versions and alternative implementations. Now with more Ruby 4.0 feature support. - [rbspy v0.42.0](https://github.com/rbspy/rbspy) – Sampling profiler for Ruby processes that can be used without restarting them. Adds support for this week's Ruby releases. - [Typelizer 0.7](https://github.com/skryukov/typelizer) – Automatically generates TypeScript interfaces from Ruby serializers for type consistency. - [The Git Gem v4.3](https://github.com/ruby-git/ruby-git) – Ruby interface for interacting with Git repos using the command line. - [Haml 7.2](https://github.com/haml/haml) – The long-standing HTML Abstraction Markup Language template engine. - [Thor 1.5](https://github.com/rails/thor) – Simple tool for building self-documenting command line utilities. - [RQRCode v3.2](https://github.com/whomwah/rqrcode) – Library for creating and rendering QR codes. - [Resque 3.0](https://github.com/resque/resque) – The Redis-backed background job library. - [RubyGems 4.0.4](https://blog.rubygems.org/2026/01/15/4.0.4-released.html) - [RDoc 7.1](https://github.com/ruby/rdoc/releases/tag/v7.1.0) 📰 Classifieds 💰We’ll save you 33% on your hosting bill – or YOU DON’T PAY. [Try the ONLY autoscaler](https://judoscale.com/ruby-weekly-33?utm_source=ruby-weekly&utm_medium=newsletter&utm_campaign=ruby-weekly-33) with a savings guarantee. --- 🚀 Auth0 for AI Agents is the complete auth solution for building AI agents more securely. [Start building today](https://auth0.com/signup?onboard_app=auth_for_aa&ocid=701KZ000000cXXxYAM_aPA4z0000008OZeGAM?utm_source=cooperpress&utm_campaign=amer_namer_usa_all_ciam_dev_dg_plg_auth0_native_cooperpress_native_aud_jan_2026_placements_utm2&utm_medium=cpc&utm_id=aNKWR000002m8zp4AA). 📢 Elsewhere in the ecosystem Some other interesting stories in the broader landscape: [![\](https://res.cloudinary.com/cpress/image/upload/w_1280,e_sharpen:60,q_auto/kt4qao7bq1rxa0zdfvdc.jpg)](https://martinalderson.com/posts/which-programming-languages-are-most-token-efficient/) - Martin Alderson looked into [which programming languages are most 'token efficient'](https://martinalderson.com/posts/which-programming-languages-are-most-token-efficient/) when used with LLMs _(above)_. Ruby came in third place, barely pipped by Clojure and Julia. - Last week we featured Marco Roth's efforts with [Charm Ruby](https://charm-ruby.dev/) to bring a lot of extra flair to Ruby's TUI story but somehow missed his [fantastic in-depth blog post about the whole project](https://marcoroth.dev/posts/glamorous-christmas) that's also packed with screenshots. - The team at 37signals shared an hour-long video [▶️ about how they moved billions of files off of Amazon S3.](https://dev.37signals.com/moving-mountains-of-data-off-s3/) - Hiroshi Shibata [suggests unbundling `net-ftp`, `net-pop`, and `prime`.](https://bugs.ruby-lang.org/issues/21835) Curated by [Peter Cooper](https://twitter.com/cooperx86) and [Glenn Goodrich](https://twitter.com/ruprict). Published by [Cooperpress](https://cooperpress.com/). [Change your email](https://rubyweekly.com/edit_subscription/*|UID|*) or [Stop getting this newsletter.](https://rubyweekly.com/leave/*|UID|*) © Cooper Press Ltd · Fairfield Enterprise Centre, Louth, LN11 0LS, United Kingdom Other weekly newsletters we publish include [Postgres Weekly](https://postgresweekly.com/), [React Status](https://react.statuscode.com/), [Frontend Focus](https://frontendfoc.us/), and [JavaScript Weekly](https://javascriptweekly.com/).