#​654 — May 18, 2023

Read on the Web

Together with  pgAnalyze

Ruby Weekly

Ruby 3.3 Preview 1 Released — Christmas Day, and the eventual release of Ruby 3.3, might be seven months away, but there’s already a preview release to sink your teeth into. It is early days though and the range of new features is limited. Updates include:

  • A new pure Ruby JIT called RJIT (x86-64 & Unix only for now).
  • Big YJIT performance improvements.
  • ext/readline retired in favor of Reline.
More additions are anticipated as we approach the eventual release.

Yui Naruse

Free eBook: Advanced Database Programming with Rails and Postgres — Learn about subqueries, materialized views, and custom data types in Postgres and Rails. We walk through realistic real-life examples, translating first into SQL, and then into Rails code. Every example comes with source code so you can follow along.

pganalyze sponsor

A Field Report from RubyKaigi — If you weren’t able to make it to RubyKaigi 2023 in Japan, never fear. Justin Searls acts as your eyes and ears on the ground in this thorough report summarizing a variety of talks on topics from ReDoS attacks to the future of the Ruby parser.

Justin Searls

Polyphony 1.0: Fine-Grained Concurrency for Ruby — Uses fibers and io_uring (or libev) under the hood to provide a cooperative, sequential coroutine-based concurrency model. Thankfully there are lots of usage examples.

Digital Fabric


📕 Tutorials, Articles, and Videos

From Ruby to Crystal? Writing and Distributing a CLI Tool — The saga of building a cross-platform CLI using Crystal, a compiled language with static types that’s very Ruby like. But how Ruby-esque is Crystal, really? And is it the best choice for building statically linked binaries in a friendly language?

Valentin Kiselev and Travis Turner (Evil Martians)

Refactoring a Rails App to Use Action Mailer for Transactional Email — A handy step-by-step tutorial born from recent experience.

Harrison Broadbent

A Better Postgres Support Experience — "We’re able to do so much more working with a partner who cares as much about data as we do." –CareRev case study

Crunchy Bridge sponsor

Flog-Driven Development — This fifth installment in an ongoing series explores Flog, a tool that measures the complexity of your code, and how it can drive your development toward a simpler implementation.

Kevin Murphy

Running Ruby 3.2's YJIT in Production at Discourse — Discourse (the forum folks) ran a test on two sets of clusters to evaluate the now production-ready YJIT in Ruby 3.2. The results were encouraging, resulting in all hosted servers now running YJIT. If you’re self-hosting Discourse, it’s worthwhile to opt-in to YJIT once you understand the effects.

Tan Guo Xiang (Discourse)

'Inline' Routes in Rails — Thanks to Rack, you can rig up a simple route without getting a typical Rails controller or view involved.

Akshay Khot

Handling Environment Variables in Ruby — And a few tools to make it easier.

Ariel Juodziukynas

How to Create Custom Flash Types in Rails
Akshay Khot

🛠 Code & Tools

ChatGPTErrorHandler: For More Helpful Error Messages — This is a cute use for ChatGPT by having it attempt to explain your app’s errors along with a potential remedy. (You’ll need an OpenAI API token.)

Nick Schwaderer

Docker Rails Example 0.8 — A production-ready example Rails 7 app using Docker and Docker Compose.

Nick Janetakis

Is Your Monitoring Provider’s Complexity Slowing… You… Down?🐌 — Honeybadger’s dead simple UI makes it easy to find and fix problems quickly so you can get on with your day. Try it now.

Honeybadger sponsor

chroma-rb: Chroma Vector Database Client — Chroma is an “AI-native” open-source embedding database and this client opens it up to Rubyists who want to store and search embeddings.

Mario Alberto Chávez Cárdenas

Mayu: A Live-Streaming Server-Side Component-Based Framework — This is typically more of a JavaScript kind of idea but this is an interesting experiment with enough to play with if you’re interested in reactive and Next.js-like ideas in Ruby.

Andreas Alin

Vessel: Fast High-Level Web Crawling Framework — Vessel uses Ferrum, the Ruby API based on the Chrome DevTools Protocol (CDP), to crawl and parse pages as “fast as Chrome.”



Full Stack Engineer, Ruby & React (’s-Hertogenbosch, Netherlands) — We help companies with fast & simple business loans. Own projects, work closely with stakeholders. No suits, just impactful code.

Find Ruby Jobs with Hired — Hired makes job hunting easy-instead of chasing recruiters, companies approach you with salary details up front. Create a free profile now.