The talks from RubyKaigi 2020, and a new Ruby debugger option

#519 — September 17, 2020

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Ruby Weekly

The Life-Changing Magic of Tidying Ruby Object Allocations— A transcription of Richard’s talk at EuRuKo last year that uses a Marie Kondo “Does it bring you joy?” look at allocations and how to remove the joyless offenders. In addition, Richard says: “Follow along as I trace some memory allocation hotspots and clean them up in the Rails codebase,” which sounds good to me.

Richard Schneeman

RubyJard: Just Another Ruby Debugger— It’s early days for this new Byebug and Pry powered debugging system but it already looks pretty cool. Here’s a view of it in action.

Minh Nguyen

We’ve Helped 100s of Customers Speed-Up Postgres Queries by 1000x. Learn How— With pganalyze, companies like Atlassian are able to speed up their queries by orders of magnitude. In this ebook, we share our best practices for optimizing Postgres performance.

pganalyze sponsor

▶  30 Talks from RubyKaigi Takeout 2020— For 2020, the usual RubyKaigi (Japan’s ‘home’ Ruby conference) went virtual in ‘takeout’ form – however, the same high quality of speakers and mixed Japanese/English sessions remained, and now you can enjoy the talks on YouTube. Some highlights:

• elct9620 asks if it's time to run Ruby on the Web using WebAssembly. An exciting proposition that feels like it's in its early days.
• A practical talk by Jeremy Evans on the past, present and future of keyword arguments.
• Yuji Yokoo covered an interesting topic by looking at creating Sega Dreamcast games with mruby— a fun and well recorded talk.
• Vladimir Dementyev spoke about the transpilation of Ruby code and Ruby Next.
• If TruffleRuby intrigues you, check out Benoit Daloze's talk on running Rack and Rails apps faster with it.
• The inimitable Aaron 'tenderlove' Patterson spoke about instance variable performance but in Japanese 🇯🇵 The slides are in English though!

RubyKaigi

▶  Discussing Ruby 3.0 JIT and Its Performance Benefits— The Ruby Rogues panelists are joined by Takashi Kokubun who’s developing Ruby’s still experimental JIT functionality – they cover the progress, problems, and strategies for implementing JIT in Ruby to meet expected performance goals.

Ruby Rogues Podcast podcast

💻 Jobs

Principal Engineer (SF/Remote)— Come be a leader here. Raise the bar. We're changing user behavior in an entire industry and need strong engineers to join up.

Shift

Fullstack Ruby on Rails Developer (Full Remote)— We're looking for smart devs to join our fast-growing, well-funded company that makes thousand of African fashion designers happy.

Afrikrea Platform

Find Your Next Job Through Vettery— Create a profile on Vettery to connect with hiring managers at startups and Fortune 500 companies. It's free for job-seekers.

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📘 Articles & Tutorials

▶  Contributing to the Thor Project— In just 18 minutes, this is a neat example of how you might approach improving an existing tool. Thor is a toolkit for building CLIs in Ruby, parsing arguments, etc.

Go Rails

Zero-Downtime Migrations in Rails— More specifically, this is a way to rename a column without downtime or your exception alerts getting upset.

Sandip Mane

Another Reason to Avoid constantize in Rails— Really, one should avoid using (or overriding) const_missing, as doing so can lead to memory leaks and vulnerabilities.

Justin Collins

⌛ TimescaleDB for Ruby Developers Quickstart— Learn how to connect your Rails apps to TimescaleDB (relational time-series database), run your first query & more.

Timescale sponsor

Creating an SMS Reminder Service with Ruby and a Raspberry Pi— I think one could automate their entire house with a few RPis and Ruby.

Emmanuel Hayford

Rails Concerns: To Concern Or Not To Concern— If you’ve ever seen the app/controllers/concerns and app/models/concerns folders in a Rails app and not gone near them, this is for you.

Nikola Đuza

Using Multiple Databases in Rails 6 to Log Access Requests— An interesting use case.

Josh Software

Rails Adds Support for Adding a Default Value to Rich Text Areas— Expect this to land in Rails 6.1 (which probably isn’t too far away now).

Vamsi Pavan Mahesh

A Gentle Introduction to Web Services with Go— Written from a ‘coming from Ruby’ perspective which you might find intriguing.

Ayooluwa Isaiah

What's New in Sidekiq, 2020 Edition— Notes across the product suite.

Mike Perham

🛠 Code and Tools

Klipse: A Javacript Plugin for Embedding Interactive Code Snippets in Blog Posts— Supports many languages, including Ruby, Python, C++, Clojure, and Google Charts. The Ruby interpretation is done via Opal so there will be limitations.

Yehonathan Sharvit

rack-mini-profiler 2.1: A Profiler for Rack Apps in Dev or Production— A popular piece of middleware that adds a ‘speed badge’ to pages in your app to show off database, call-stack and memory profiling data.

Sam Saffron et al.

Become a Ruby Guru with RubyMine

JetBrains sponsor

ValidEmail2: ActiveModel Validation for Email— Check the legitimacy of email addresses including MX lookup and checking against a list of disposable email services.

Micke Lisinge

Ruby Next 0.10.0 Brings in Some Ruby 3.0 Features to Ruby 2— Specifically, find pattern, leading arguments in forwarding (so def method(name, ...), and Hash#except. Ruby Next is more generally a transpiler and set of polyfills to allow modern Ruby code to run in older versions.

Ruby Next

Circuitry: Decouple Apps Using SNS Fanout with SQS Processing— If you’re interested in decoupling your app using message and event passing via AWS’s notification and queue services, this provides a framework to do so.

Kapost