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Joshua Young @joshuay03.bsky.social · 4d

Time for a holiday?

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Joshua Young @joshuay03.bsky.social · 12d

September flew by pretty quickly… I kicked it off by attending #RailsWorld!

www.linkedin.com/posts/joshua...

#railsworld | 🍯 Joshua Young

Attended the third edition of Rails World earlier this month along with Jason and Julián, back in Amsterdam once again! A big thank you to Buildkite for sponsoring the three of us to attend this year....

www.linkedin.com

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Joshua Young @joshuay03.bsky.social · 19d

Was it the colonoscopy room?

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Joshua Young @joshuay03.bsky.social · 19d

I’ve added support for distributed deployments: github.com/joshuay03/di...

Couple of ideas to follow up on:
- Profile dashboard
- Profile comparisons

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Joshua Young @joshuay03.bsky.social · Aug 30

This is from a Datadog APM notebook I used to monitor the impact.

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Joshua Young @joshuay03.bsky.social · Aug 30

Haha yep, I have to remind myself from time to time as well.

Joshua Young @joshuay03.bsky.social · Aug 30

Yes, at the very end of a before_fork—after doing any necessary closing of connections, shutting down threads, etc.

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Joshua Young @joshuay03.bsky.social · Aug 30

Satisfying memory and CPU improvements after enabling Puma preloading + Process.warmup on one of Buildkite's services (our agent shard). Just rolled this out to all services - keen to see the broader impact!

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Joshua Young @joshuay03.bsky.social · Aug 19

It probably hasn’t been released yet. I would first check if the change has been back-ported to the `8-0-stable` branch, and then whether it was actually included in a release. If not, and it’s already on the branch, it’ll probably be released in a 8.0.x at some point, else 8.1.x.

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Joshua Young @joshuay03.bsky.social · Aug 9

What a run! Hope you enjoy some well deserved time off!

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Joshua Young @joshuay03.bsky.social · Aug 5

> I believe `Rack::Timeout` does trigger a full process shutdown after killing a thread.

You need to opt in by enabling `term_on_timeout` (github.com/zombocom/rac...).

Allow sending SIGTERM to workers on timeout by schneems · Pull Request #157 · zombocom/rack-timeout

When rack-timeout fires then it can put an application in a "bad" state. This is due to https://www.schneems.com/2017/02/21/the-oldest-bug-in-ruby-why-racktimeout-might-hose-your-server/....

github.com

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Joshua Young @joshuay03.bsky.social · Jul 26

TIL 👀 Thanks!

Joshua Young @joshuay03.bsky.social · Jul 26

Yes, just 3-12 bytes:
- github.com/puma/puma/bl...
- github.com/puma/puma/bl...

Good point, mmap + polling + small messages is probably less efficient than using pipes in this case. I'm still going to give it a go to scratch that itch 😊

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Joshua Young @joshuay03.bsky.social · Jul 26

I’m curious how Puma would perform with mmap instead of pipes, which it relies on heavily for IPC in cluster mode: github.com/puma/puma/bl....

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Joshua Young @joshuay03.bsky.social · Jul 26

I wrote (or rewrote) some gems to get better at Ruby C extensions and learn about these topics (CAS and mmap):
- github.com/joshuay03/at...
- github.com/joshuay03/mm...

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Joshua Young @joshuay03.bsky.social · Jun 13

I'm curious about this too. With YJIT in maintenance mode, bug fixes, UX improvements, etc., are probably welcome (a colleague recently found and fixed one). But with ZJIT being greenfield WIP, I'm not so sure. Completely understandable if that's the case though.

acutedistress.bsky.social @acutedistress.bsky.social · Jun 12

Is there any point hacking on ZJIT or YJIT if I’m not a Shopify employee?
#ruby

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Joshua Young @joshuay03.bsky.social · May 10

Young* 🙂

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Joshua Young @joshuay03.bsky.social · May 5

Had a blast at #RubyKaigi 2025!

www.linkedin.com/posts/joshua...

#rubykaigi | 🍯 Joshua Young

Ruby friends, old and new, at #RubyKaigi 2025—another amazing edition of the largest and most prestigious Ruby conference. I love this community and this event, and hope to be back every year ❤️ Hug...

www.linkedin.com

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Joshua Young @joshuay03.bsky.social · May 1

Great talk! Though my favorite is still the one you gave at RailsConf 2022.

As a noob OSS contributor and maintainer, I’ve learned a lot from your talks about the "duties" and "responsibilities" of both sides in OSS interactions—I’m trying to apply those principles in my own work as well.

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Reposted by Joshua Young

Vipul A M @vipulnsward.com · Apr 16

#RubyKaigi late night with #RubyFriends !

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Joshua Young @joshuay03.bsky.social · Apr 10

It's not perfect but it does the job! Please let me know how you go if you give it a whirl.

So far I've tried it on three Rails monoliths of decent scale (including Buildkite's), and it gives me everything I need to profile requests in a multithreaded development environment - both Ruby and IO.

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Joshua Young @joshuay03.bsky.social · Apr 10

My current focus is production support.

I'm also hoping to add support for a few more useful AS notification events: github.com/jhawthorn/ve...

Then, I'd like to start thinking about adding some custom hooks to integrate with other gems.

Add more ActiveSupport notification event markers by joshuay03 · Pull Request #119 · jhawthorn/vernier

WIP New comprehensive list: # ActiveRecord sql.active_record instantiation.active_record start_transaction.active_record (added) transaction.active_record (added) # ActionController start_proces...

github.com

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Joshua Young @joshuay03.bsky.social · Apr 10

With Dial, Vernier does all the heavy lifting, and viewing a request profile is just a click away. The hook into AS notifications is simple yet powerful, giving you a useful timeline of the events that matter.

I've included N+1 detection and VM stat diffs to complement these, open to more ideas.

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Joshua Young @joshuay03.bsky.social · Apr 10

Announcing Dial, a Rails application profiler: github.com/joshuay03/dial

I've longed for a free tool that provides Datadog-like profiles, with accurate GVL and GC activity. Thanks to @jhawthorn.com's amazing work on Vernier, all I needed to do was integrate it with Rails and let it do its thing.

GitHub - joshuay03/dial: A modern profiler for your Rails application

A modern profiler for your Rails application. Contribute to joshuay03/dial development by creating an account on GitHub.

github.com

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Joshua Young @joshuay03.bsky.social · Apr 9

FYI the year on the post is 2022.

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