@_byroot

Rails core, Ruby committer, Senior Principal Engineer at Intercom. Bsky: https://xitter.cf/t.co/05cdHJkcO4 Mastodon: @byroot@ruby.social

 Toulouse
github.com/byroot
Joined April 2022
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After several months of work, we finally enabled Pitchfork reforking on 100% of Shopify's monolith. ~30% reduction in memory usage, ~9% better latency and more! railsatscale.com/2023-10-23-…

Effects of Pitchfork reforking on Shopify’s Monolith

Over the last year, I’ve been working on a new Ruby application server called Pitchfork. In most regards it’s extremely similar to the venerable Unicorn, from which it originates, but with one major...

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Jean Boussier retweeted
rubyireland@rubyirelandAug 18
🚂 Ruby Ireland is back! Agents of Concurrency - September 10th at @fin_ai Jean Boussier makes the case for multiprocessing in Rails, while Ryan Sherlock gets into shipping AI agents on Rails - fast, repeatedly, and in production. Thx Fin! RSVP 👇 meetup.com/rubyireland/event…

Agents of Concurrency, Thu, Sep 10, 2026, 6:30 PM | Meetup

It's quite late in the year to be coming out of hibernation but if rarity makes a thing more precious then this event is surely is one heck of a valuable meetup. And indeed

meetup.com
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A quick followup on Ruby Hashes byroot.github.io/ruby/perfor…

Speeding Up (small) Ruby Hashes

Something I must confess is that I absolutely hate writing these blog posts. It’s not quite as bad as having to give a conference talk, but it’s up there on the list of activities that feel like...

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I'll probably release the final 3.0.0 version early September, so if you got time please try the RC1 and submit any feedback you may have: github.com/ruby/json/release…

Release v3.0.0.rc1 · ruby/json

With the removal of the insecure create_additions option, JSON.load and JSON.dump are now safe to use. Them being unsafe by default caused multiple security vulnerabilites in the past. If you did d...

github.com
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A history of Ruby's Hash tables, and how we can make them use less memory: byroot.github.io/ruby/perfor…

Shrinking Ruby Hashes

As you may know, one area of Ruby performance optimization that particularly interests me is memory usage. Given that most Ruby deployments rely on fork, improving Copy-on-Write performance is...

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While it has been 18 months since I blogged about it, the json gem performance has improved quite significantly since, so now is a good time to add a few more parts to my JSON series: byroot.github.io/ruby/json/2…

Optimizing Ruby’s JSON, Part 8

It has now been about 18 months since I concluded my post series on optimising Ruby’s json.

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This one feels good. No more stupid comments at the top of files. At least in one repo.
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Jean Boussier retweeted
Hiroshi SHIBATA@hsbtApr 20
I wrote answer letter: github.com/ruby/rubygems/dis…

Proposal: override DSL in Gemfile for managing version constraints · ruby rubygems · Discussion...

Background In the discussion around #9454, reviewers (including @byroot and @Edouard-chin) pointed out that BUNDLE_IGNORE_RUBY_UPPER_BOUNDS and BUNDLE_IGNORE_RUBYGEMS_UPPER_BOUNDS should be express...

github.com
Jean Boussier@_byrootApr 20
I wrote some more as a way to fight jet lag, hopefully it's still readable 😅: byroot.github.io/ruby/bundle…

The Missing Bundler Features

Over the last few months, there has been a lot of talk about making Bundler faster, both by improving it directly, or by reimplementing it in another language, and while it may surprise some, that...

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