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RubyKaigi 2025

Matsuyama, Ehime, Japan • April 16-18, 2025

rubykaigi.org/2025
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RubyKaigi is a yearly conference and features 70 talks from various speakers, including keynotes by Mari Imaizumi, Ivo Anjo, and Yukihiro "Matz" Matsumoto.

Talks Speakers Schedule

Day 1 - Wednesday (Apr 16, 2025)

09:00 - 10:00
Door Open
10:00 - 11:00
Main Hall #rubykaigiA
 
Keynote: Ruby Taught Me About Encoding Under the Hood

Mari Imaizumi
11:10 - 11:40
Main Hall #rubykaigiA
 
Make Parsers Compatible Using Automata Learning

Hiroya FUJINAMI
Sub Hall #rubykaigiB
 
Bringing Linux pidfd to Ruby

Maciej Mensfeld
Pearls Room #rubykaigiC
 
Introducing Type Guard to Steep

Takeshi KOMIYA
11:50 - 12:20
Main Hall #rubykaigiA
 
The Evolution of the CRuby Build System

Yuta Saito
Sub Hall #rubykaigiB
 
A side gig for RuboCop, the Bookworm code crawler

David T. Crosby
Pearls Room #rubykaigiC
 
Continuation is to be continued

Masayuki Mizuno
12:20 - 14:00
Lunch Break
14:00 - 14:30
Main Hall #rubykaigiA
 
Deoptimization: How YJIT Speeds Up Ruby by Slowing Down

Takashi Kokubun
Sub Hall #rubykaigiB
 
Empowering Developers with HTML-Aware ERB Tooling

Marco Roth
Pearls Room #rubykaigiC
 
Goodbye fat gem 2025

Sutou Kouhei
14:40 - 15:10
Main Hall #rubykaigiA
 
Ruby's Line Breaks

Yuichiro Kaneko
Sub Hall #rubykaigiB
 
SDB: Efficient Ruby Stack Scanning Without the GVL

Mike Yang
Pearls Room #rubykaigiC
 
Automatically generating types by running tests

Takumi Shotoku
15:10 - 15:40
Afternoon Break
15:40 - 16:10
Main Hall #rubykaigiA
 
State of Namespace

Satoshi Tagomori
Sub Hall #rubykaigiB
 
Embracing Ruby magic: Statically analyzing DSLs

Vinicius Stock
Pearls Room #rubykaigiC
 
50.000 processed records per second: a CRuby & JRuby story

Cristian Planas
16:20 - 16:50
Main Hall #rubykaigiA
 
mruby/c and data-flow programming for small devices

Kazuaki Tanaka
Sub Hall #rubykaigiB
 
Parsing and generating SQLite's SQL dialect with Ruby

Stephen Margheim
Pearls Room #rubykaigiC
 
dRuby on Browser Again!

Yoh Osaki, Shigeru Nakajima
17:00 - 18:00
Main Hall #rubykaigiA
 
TRICK 2025: Episode I

Yusuke Endoh, Koichiro Eto, Shinichiro Hamaji, Yutuka Hara, Yukihiro "Matz" Matsumoto, Sun Park, Darren Smith, Tomoya Ishida