--- title: "The beautiful simplicity of async in Ruby" publication: "Ruby Weekly" issue: 758 published_at: "2025-07-10" canonical_url: "https://rubyweekly.com/issues/758" --- Plus a new Web framework, hosting apps on a Mac Mini, and Obie's AI team of Rails developers. | #​758 — July 10, 2025 [Read on the Web](https://rubyweekly.com/issues/758) Together with [![Testdouble\](https://res.cloudinary.com/cpress/image/upload/c_fill,g_auto,w_1280,h_279/e_make_transparent/co_white,e_outline:32/fuxab1jg21v6anerbqwg.png)](https://link.testdouble.com/a27918) Ruby Weekly [![\](https://res.cloudinary.com/cpress/image/upload/w_1280,e_sharpen:60,q_auto/aybtgoyi0myudue4r4yn.jpg)](https://naildrivin5.com/blog/2025/07/08/brut-a-new-web-framework-for-ruby.html) [Brut: A New Web Framework for Ruby](https://naildrivin5.com/blog/2025/07/08/brut-a-new-web-framework-for-ruby.html) — With no controllers, no verbs, no resources, and an HTML-first, ‘low-ceremony’ approach [Brut](https://brutrb.com/) is treading its own path. [Here’s a broader conceptual overview](https://brutrb.com/overview.html) of what it’s about; I think it makes some fantastic choices and David has clearly put a lot of effort into it. _(Be aware of the [atypical licensing](https://github.com/thirdtank/brut/blob/main/LICENSE.txt), though.)_ David Bryant Copeland [Async Ruby is the Future of AI Apps (And It's Already Here)](https://paolino.me/async-ruby-is-the-future/) — After years in Python’s async ecosystem, Carmine found Ruby’s approach to concurrency dated at first, before discovering the beauty of fiber-based concurrency and its advantages for AI integration use cases and I/O-bound workloads in general — without big Python-style async rewrites. Carmine Paolino [![\](https://res.cloudinary.com/cpress/image/upload/c_limit,w_480,h_480,q_auto/copm/87ebcf90.jpg)](https://link.testdouble.com/a27918) [Refactor vs. Rewrite is a False Dichotomy](https://link.testdouble.com/a27918) — Choose a different path: test driven modernization. Remediation is a chance to let go of what you don’t need, and reduce both costs and risk. Right-size subsystem design with seam-based modernization. Modernize with minimal downtime and defects. Test Double sponsor **IN BRIEF:** - [A denial of service vulnerability has been found](https://www.ruby-lang.org/en/news/2025/07/08/dos-resolv-cve-2025-24294/) in Ruby's bundled `resolv` gem (used for DNS resolution). Luckily you can _resolve_ it by upgrading your `resolv`gem. - [Some vulnerabilities have been discovered in `git` too](https://github.blog/open-source/git/git-security-vulnerabilities-announced-6/) and you're recommended to upgrade that as well. - Active Record is adding a way to [mark associations as 'deprecated'](https://github.com/rails/rails/pull/55285) so you get warnings when you try to use them. - 🇺🇸 [San Francisco Ruby Conference](https://sfruby.com/) is taking place this November 19-20 with a [great lineup of speakers so far](https://sfruby.com/speakers/). [The CFP is open](https://cfp.sfruby.com/) for a few more days, if you want to speak. [How to Host Web Apps on a Mac Mini](https://www.contraption.co/how-to-host-web-apps-on-a-mac-mini/) — Instructions and a set of Ruby-based scripts for setting a Mac up to function as a server, open access to users with Cloudflare, and more. Philip I. Thomas [Rails Dashboards That Scale with SQL and `dry-struct`](https://pcreux.com/2025/07/09/rails-dashboards-with-sql-and-dry-struct) — _“While we can piece together reports and dashboards using Active Record, it can be more efficient to use SQL to transform data and [dry-struct](https://dry-rb.org/gems/dry-struct/1.6/) to turn query results into Ruby objects with strong typing.”_ Philippe Creux [🌳 Slash Rails Tech Debt with Bonsai’s Monthly Maintenance Service](https://go.fastruby.io/slash-tech-debt) — Expert upgrades, dependency management, & security fixes—flexible non-committal plans to improve your app's performance. Bonsai by FastRuby.io sponsor 📄 [Rails' Database Connection Pooling Explained](https://www.prateekcodes.dev/rails-database-connection-pooling-explained/) Prateek Choudhary 📄 [Rails 8's Ability to Use Multiple Rate Limits Per Controller](https://www.prateekcodes.dev/rails-8-multiple-rate-limits-per-controller/) Prateek Choudhary 📄 [Hotwire Components That Refresh Themselves](https://boringrails.com/articles/self-updating-components/) Boring Rails 📄 [The `then` Method - What is It?](https://benkoshy.github.io/2024/12/09/then-ruby-keyword.html) Ben Koshy 🛠 Code & Tools [Introducing _UringMachine_: Concurrent I/O with io_uring and Fibers](https://noteflakes.com/articles/2025-06-28-introducing-uringmachine) — io_uring is a high performance, asynchronous I/O API introduced in Linux in 2019 and now you can reap its benefits directly from Ruby. Sharon shows off some of the benefits here and some initial Ruby apps that are using it. Sharon Rosner 🤖 [ClaudeOnRails: Transform Claude into a 'Team of Rails Developers'](https://obie.medium.com/introducing-claudeonrails-a25fb82ae37b) — Obie is back with a new AI tool that uses Claude Swarm to create a team of AI agents for building Rails apps in particular. Very experimental but worth a try if you’re playing with Claude Code already. [GitHub repo.](https://github.com/obie/claude-on-rails) Obie Fernandez 🎂 BTW, it's Obie's birthday today – happy birthday to one of the Ruby greats! 😄 [Errors, Logs, Performance, & More + Great UX and Pricing 🔥](https://www.honeybadger.io/plans/?utm_source=rubyweekly&utm_medium=email&utm_campaign=2025-07-10-rubyweekly-link) — “When are we switching to Honeybadger?” - Andrew Mason. [Try our free developer plan →](https://www.honeybadger.io/plans/?utm_source=rubyweekly&utm_medium=email&utm_campaign=2025-07-10-rubyweekly-link) Honeybadger sponsor 🎨 [Color 2.0: Color Space Manipulation Methods](https://github.com/halostatue/color) — Manipulate and convert colors in different color spaces (e.g. RGB, CMYK, HSL), work with named RGB colors, and more. Austin Ziegler, Matt Lyon, et al. [Postcard: A Newly Open-Sourced Website + Newsletter App](https://www.contraption.co/postcard-open-source/) — A Rails app that’s [used in production](https://postcard.page/) (_“I make dozens of dollars per month on it”_) which you can now deploy for yourself to put together a personal site with integrated newsletter functionality. Philip I. Thomas - [numbers_and_words 1.0.2](https://github.com/kslazarev/numbers_and_words) – Convert numbers to words using I18N. - [Sord 7.1](https://github.com/AaronC81/sord) – Convert YARD docs to RBI and RBS type signature files. - 🤖 [OpenAI Ruby 0.12](https://github.com/openai/openai-ruby/releases/tag/v0.12.0) – Official Ruby SDK for the OpenAI API. - 🤖 [gemini-ai 4.3](https://github.com/gbaptista/gemini-ai) – Interact with Google's generative AI services. - [Gitlab 6.0](https://github.com/NARKOZ/gitlab) – Ruby CLI and library for the GitLab API. - [Gemsmith 23.5](https://github.com/bkuhlmann/gemsmith) – CLI tool for smithing Ruby gems. - [Jekyll Polyglot 1.10](https://polyglot.untra.io/2025/07/07/polyglot-1.10.0/) – i18n support plugin for Jekyll. - [Test::Unit 3.7](https://github.com/test-unit/test-unit) – xUnit-style testing for Ruby. 📰 Classifieds 📈 [If your Rails team needs a little boost...](https://sinaptia.dev/services/staff-augmentation) SINAPTIA can augment your team with devs to help you increase your productivity. [Test us!](https://sinaptia.dev/contact-us) --- 🐞 Catch Ruby bugs & bottlenecks fast with [AppSignal](https://www.appsignal.com/?utm_source=cooperpress&utm_medium=cooperpress&utm_term=ruby_nl). Save hours debugging with just five minutes to set up. [Start your 30-day free trial today!](https://www.appsignal.com/?utm_source=cooperpress&utm_medium=cooperpress&utm_term=ruby_nl) --- 🐱 [ConfigCat Feature Flag Service](https://configcat.com/pricing/?utm_source=cooperpress_newsletter&utm_medium=sponsor&utm_campaign=cooperpress_ruby_202506) lets you run gradual rollouts, A/B tests & target users without code changes. Use coupon RUBY25 & save 25%! 🎁 Goodies from elsewhere In my endless crawling of the Internet, I'm always coming across neat stuff that doesn't directly fit into the newsletter, but that I'd like to share anyway. Here are some of the most recent ones: - **Caching:** PlanetScale has shared [a neat interactive article about caching](https://planetscale.com/blog/caching) that visually demonstrates the benefits of caching from several different angles, including at the CPU level. - **Animated SVGs:** Did you know [you can generate efficient SVGs that feel like GIFs](https://koaning.io/posts/svg-gifs/) and even use them in your GitHub README.md files? - **CGI redux:** I used to run some basic Ruby apps using CGI 10+ years ago (_Ruby Weekly_'s subscription process was a CGI script!) so it's neat to see people [considering the potential of running apps with CGI in 2025.](https://jacob.gold/posts/serving-200-million-requests-with-cgi-bin/) The performance of modern CPUs and quick process spawning times makes it possible to use CGI at serious scale, _if you really needed to._ - **IP certificates:** [Let's Encrypt has just issued its first _IP address_ certificate.](https://letsencrypt.org/2025/07/01/issuing-our-first-ip-address-certificate/) This feature will be more broadly rolled out over the year. Two catches are that the certificates only last for six days and they don't support DNS challenges for hopefully obvious reasons ;-) - **Fixing wonky JSON:** [jsonrepair](https://github.com/josdejong/jsonrepair) is a Node.js library, CLI tool, and [basic online tool](https://josdejong.github.io/jsonrepair/) for fixing up invalid JSON documents so they'll at least parse. - **Egress pricing:** [A comparison of data egress costs](https://getdeploying.com/reference/data-egress) from about 40 popular providers and cloud services, including Vercel, AWS, Fly and Linode. - **Landing pages:** The folks at Evil Martians have taken [a look at 100 different devtool landing pages](https://evilmartians.com/chronicles/we-studied-100-devtool-landing-pages-here-is-what-actually-works-in-2025) to see what really works in 2025. 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/).