---
title: "On Enumerable's loveliness (and performance)"
publication: "Ruby Weekly"
issue: 752
published_at: "2025-05-29"
canonical_url: "https://rubyweekly.com/issues/752"
---

Plus the RubyKaigi videos are live. |        

#​752 — May 29, 2025 

[Read on the Web](https://rubyweekly.com/issues/752)  

Together with [![FastRuby.io\](https://res.cloudinary.com/cpress/image/upload/c_fill,g_auto,w_467,h_106/e_make_transparent/co_white,e_outline:14/y65nyff19ylf5udphsq4.png)](https://go.fastruby.io/pqm)   

Ruby Weekly 

[![\](https://res.cloudinary.com/cpress/image/upload/w_1280,e_sharpen:60,q_auto/l2hgg3goyjmisjsnzpw2.jpg)](https://www.youtube.com/playlist?list=PLbFmgWm555yYE_j4F1onI1NA2RQFyyLPL#rubykaigi2025)  

▶[The RubyKaigi 2025 YouTube Playlist](https://www.youtube.com/playlist?list=PLbFmgWm555yYE_j4F1onI1NA2RQFyyLPL#rubykaigi2025) — Ruby's 'home' conference, [RubyKaigi](https://rubykaigi.org/2025/), is an important entry in the Ruby event calendar. 2025's event took place last month featuring a keynote from Matz and talks from Tenderlove, Koichi Sasada, and many others. There are 57 talks (in English and Japanese) so you’re sure to find something interesting, but I'll link a few highlights below. 

RubyKaigi 2025   

**A FEW RUBYKAIGI TALKS:** 

- [Matz's keynote](https://www.youtube.com/watch?v=oeuYishyqo8&list=PLbFmgWm555yYE_j4F1onI1NA2RQFyyLPL&index=7) is in Japanese, though you can turn on subtitles. It's a high level talk covering thoughts on AI and static typing, and Matz teases Ruby 4.0 again with a _"maybe"_.
- Takashi Kokubun gave [a talk, in English, about YJIT](https://www.youtube.com/watch?v=bvK86pmU-Oc), focusing on deoptimization.
- Staying on the JIT theme, Maxime Chevalier-Boisvert [spoke about ZJIT](https://www.youtube.com/watch?v=1CCDuRW0OLk), a newer attempt at creating a Ruby JIT that was [recently merged into Ruby.](https://railsatscale.com/2025-05-14-merge-zjit/)
- I also found talks on [running Ruby in WebAssembly](https://www.youtube.com/watch?v=OuFm7F4ocNw), [modular garbage collectors](https://www.youtube.com/watch?v=04axm4JcaT4) ([related article](https://railsatscale.com/2025-01-08-new-for-ruby-3-4-modular-garbage-collectors-and-mmtk/)), [inline RBS comments](https://www.youtube.com/watch?v=l4YjoEgpmXs), and [Ruby debugging](https://www.youtube.com/watch?v=ynrXsbuApXM) to be valuable. We'll link to more talks in future as I get through them.   [![\](https://res.cloudinary.com/cpress/image/upload/c_limit,w_480,h_480,q_auto/copm/58300139.png)](https://go.fastruby.io/pqm) 

[Don’t Hire FastRuby to Upgrade Rails. Just DIY it 🚀](https://go.fastruby.io/pqm) — What do `next_rails`, `skunk`, and [RailsBump.org](https://railsbump.org/) have in common? All are open source tools maintained by the [FastRuby](https://fastruby.io/) team. Ready to ship your next Rails upgrade? Check out 8 tools we use in our [fixed-cost, monthly maintenance services](https://www.fastruby.io/monthly-rails-maintenance). 

FastRuby.io | Rails Upgrade Experts sponsor   

[A Series on `Enumerable`’s Loveliness](https://andycroll.com/ruby/cassidoo-odd_sum-programming-exercise/) — A celebration of the _lovely_ expressiveness of Ruby’s `Enumerable` methods for solving problems. He then ran [two rounds](https://andycroll.com/ruby/benchmarking-odd_sum/) of [benchmarks](https://andycroll.com/ruby/further-options-odd_sum-with-benchmarking/), concluding that writing expressive, readable Ruby first is a good idea, but it never hurts to benchmark and tune afterwards. 

Andy Croll   

💡 As an aside, it's often worth a browse [through Enumerable's methods](https://ruby-doc.org/3.4.1/Enumerable.html) – I'm always reminded of something useful that I forgot (or even a new addition).  

**IN BRIEF:** 

- 📺 Ruby Central's Rihannon Payne [▶️ has interviewed DHH](https://www.youtube.com/watch?v=8lTxC9pfRdU), covering high level topics including AI, different Rails events, [The Rails Foundation](https://rubyonrails.org/foundation), and more. We also discover David will be dropping in for a fireside chat at [the final RailsConf](https://railsconf.org/) this summer.
- Over on X, [Sam Saffron notes that GCC 15 may be causing compilation errors](https://x.com/samsaffron/status/1925318407274340398) for many native Ruby gems.
- Also on X, 37signals' [Jorge Manrubia teases a big upgrade to Action Text](https://x.com/jorgemanru/status/1926644973623025771) – essentially a _'drop-in replacement that will take rich text editing to the next level in Rails'_, all without [Trix.](https://trix-editor.org/)   

[Concurrent Web Crawling in Ruby with Async](https://losangelesaiapps.com/concurrent-web-crawling-in-ruby-with-async/) — Even if you don’t need to crawl anything, more [Async](https://github.com/socketry/async) demos in the wild is a good thing. 

Joseph Izaguirre   

[Custom Domains and SSL in Rails Development](https://avohq.io/blog/custom-domains-ssl-in-rails-development) — Using custom domains _and_ SSL in local development not only looks nice, but can make a variety of ‘secure context’ only browser features work too. 

Exequiel Rozas   

[🧠 Build Intelligent Applications with Rails](https://sinaptia.dev/posts/building-intelligent-applications-with-rails) — Learn about the strengths of Ruby and Rails in the AI era and why we choose them for AI applications development. 

SINAPTIA sponsor   

📺 [How DHH Solved Deploying to Production](https://www.youtube.com/watch?v=U-Ca67BGJRs) – A well produced 10 minute video on the [Kamal](https://kamal-deploy.org/) deployment tool. DevOps Toolbox 

📄 [Real-Time Communication with Twilio 2-Way SMS in a Rails App](https://blog.joshsoftware.com/2025/05/27/real-time-communication-with-twilio-2-way-sms-in-ruby-on-rails-application/) Rohan Dhalpe 

📄 [Streamlining the Creation of New Rails Apps with Templates](https://adbatista.github.io/2025/05/25/templates.html) Alessandro Dias 

📄 [Create a Markdown-Powered Textarea with Stimulus](https://railsdesigner.com/markdown-textarea/) Rails Designer  

🛠 Code & Tools  

🤖 [TinyMCP: Make Local MCP Tools in Ruby and Easily Serve Them](https://github.com/maxim/tiny_mcp) — On the AI in Ruby front, create Model Context Protocol servers quickly with this tiny library. 

Max Chernyak   

[Retest 2.3: A Simple Command Line Tool to Watch File Changes](https://github.com/AlexB52/retest) — Retest is made to be easy to install and work on any Ruby project to make your testing workflow more efficient. 

Alexandre Barret   

[Safely 0.5: Rescue and Report Exceptions in Non-Critical Code](https://github.com/ankane/safely) — The idea here is that while you may want to know about failures and exceptions, they don’t necessarily need to result in crashing out. 

Andrew Kane   

[CodeRabbit Brings AI Code Reviews to VS Code, Cursor & Windsurf](https://coderabbit.link/rubyweekly-may25) — Get line-by-line reviews, one-click fixes & codebase-aware feedback - all free in your IDE. Seamlessly integrates with git workflows. [Install the extension & start reviewing!](https://coderabbit.link/rubyweekly-may25) 

CodeRabbit sponsor   

- [Slack Ruby Client 2.6](https://github.com/slack-ruby/slack-ruby-client) – Access Slack's Web, Real Time Messaging and Event APIs in Ruby or via a CLI.
- [Slowpoke 0.7](https://github.com/ankane/slowpoke) – `Rack::Timeout` enhancements for Rails, such as for [safer service timeouts.](https://github.com/ankane/slowpoke?tab=readme-ov-file#safer-service-timeouts)
- [Active Storage Validations 3.0](https://github.com/igorkasyanchuk/active_storage_validations/releases/tag/3.0.0) – Library for adding validations to Active Storage attributes.
- 📊 [PgHero 3.7](https://github.com/ankane/pghero) – Postgres performance dashboard as a Rails engine.
- 🤖 [OmniAI 2.8](https://github.com/ksylvest/omniai) – A standardized API for multiple LLM platforms.
- 📊 [Gruff Graphs 0.27](https://github.com/topfunky/gruff) – RMagick-based chart rendering library.
- [Phlex Rails 2.3](https://github.com/yippee-fun/phlex-rails/releases/tag/2.3.0) – An object-oriented alternative to Action View.
- [Sidekiq v8.0.4](https://github.com/sidekiq/sidekiq/blob/main/Changes.md#804) – The background job processor.
- 🤖 [Raif 1.1](https://github.com/CultivateLabs/raif) – An AI framework in a Rails engine.
- [Literal 1.8](https://github.com/yippee-fun/literal/releases/tag/1.8.0) – Run-time type checking for Ruby.
- [Stripe Ruby Library v15.2.0](https://github.com/stripe/stripe-ruby/releases/tag/v15.2.0)      

📰 Classifieds   

Need to extend your tech team capacity fast? Our Ruby devs deliver clean, performant Rails apps. Available across all timezones. [Send project details → get CVs in 24h!](https://rubyroidlabs.com/services/ror_development?utm_source=rubyweekly&utm_medium=email&utm_campaign=sponsorship)    

📢 Elsewhere  

A quick roundup of some other interesting updates or useful resources in the broader developer landscape: 

- The Google Go team put together [▶️ a fantastic Google I/O talk about Go](https://www.youtube.com/watch?v=kj80m-umOxs) covering both a basic sales pitch for the language, but also everything new in the language in recent times. A good look at the state of Go in 2025.
- 📺 If you're confused by the plethora of popular JavaScript frameworks, the creator of SolidJS has put together a handy [▶️ ten minute explanation of how React, Angular, Vue, Svelte and Solid differ.](https://www.youtube.com/watch?v=DAci3O2j31o)
- A developer put [Node, Go, Rust, C++, Java, Python and Erlang under an intensive stress test](https://freedium.cfd/https://medium.com/@codeperfect/we-tested-7-languages-under-extreme-load-and-only-one-didnt-crash-it-wasn-t-what-we-expected-67f84c79dc34) (no Ruby, alas) to see how they handle being overloaded. Guess which one survived longest..
- The Deno team put together [a fantastic timeline of JavaScript's history](https://deno.com/blog/history-of-javascript) to celebrate JavaScript's 30th birthday this year.
- 🎉 Apropos of nothing, today is [React](https://react.dev/)'s 12th birthday.         

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/).