Schedule

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	Main Hall #rubykaigiA	Sub Hall #rubykaigiB	Pearls Room #rubykaigiC
09:00 - 10:00	Door Open
10:00 - 11:00	JA Keynote Between Character and Character Encoding Mari Imaizumi @ima1zumi
11:10 - 11:40	JA Make Parsers Compatible Using Automata Learning Hiroya Fujinami @makenowjust	EN Bringing Linux pidfd to Ruby Maciej Mensfeld @maciejmensfeld	JA Introducing Type Guard to Steep Takeshi KOMIYA @tk0miya
11:50 - 12:20	EN The Evolution of the CRuby Build System Yuta Saito @kateinoigakukun	EN A side gig for RuboCop, the Bookworm code crawler David T. Crosby @dafyddcrosby	JA Continuation is to be continued Masayuki Mizuno @fetburner
12:20 - 14:00	Lunch Break
14:00 - 14:30	EN Deoptimization: How YJIT Speeds Up Ruby by Slowing Down Takashi Kokubun @k0kubun	EN Empowering Developers with HTML-Aware ERB Tooling Marco Roth @marcoroth	JA Goodbye fat gem 2025 Sutou Kouhei @ktou
14:40 - 15:10	JA Ruby's Line Breaks Yuichiro Kaneko @spikeolaf	EN SDB: Efficient Ruby Stack Scanning Without the GVL Mike Yang @yfractal	JA Automatically generating types by running tests Takumi Shotoku @sinsoku_listy
15:10 - 15:40	Afternoon Break
15:40 - 16:10	JA State of Namespace Satoshi Tagomori @tagomoris	EN Embracing Ruby magic: Statically analyzing DSLs Vinicius Stock @vinistock	EN 50.000 processed records per second: a CRuby & JRuby story Cristian Planas @cristian_planas
16:20 - 16:50	EN mruby/c and data-flow programming for small devices Kazuaki Tanaka @kaz0505	EN Parsing and generating SQLite's SQL dialect with Ruby Stephen Margheim @fractaledmind	JA dRuby on Browser Again! Yoh Osaki @youchan
17:00 - 18:00	JA TRICK 2025: Episode I mame & the judges @tric

	Main Hall #rubykaigiA	Sub Hall #rubykaigiB	Pearls Room #rubykaigiC
10:00 - 11:00	EN Keynote Performance Bugs and Low-level Ruby Observability APIs Ivo Anjo @KnuX
11:10 - 11:40	JA Dissecting and Reconstructing Ruby Syntactic Structures Yudai Takada @ydah_	EN Benchmark and profile every single change Daisuke Aritomo @osyoyu	EN Running JavaScript within Ruby Kengo Hamasaki @hmsk
11:50 - 12:20	EN ZJIT: Building a Next Generation Ruby JIT Maxime Chevalier-Boisvert @maximecb	EN Keeping Secrets: GitHub's ENV Security Learnings Dennis Pacewicz @lyninx	JA Improvement of REXML and speed up using StringScanner NAITOH Jun @naitoh
12:20 - 14:00	Lunch Break
14:00 - 14:30	JA Writing Ruby Scripts with TypeProf Yusuke Endoh @mametter	EN Demystifying Ruby Debuggers: A Deep Dive into Internals Dmitry Pogrebnoy @DmitryPogrebnoy	JA How to make the Groovebox Yuya Fujiwara @asonas
14:40 - 15:10	JA MicroRuby: True Microcontroller Ruby Hitoshi HASUMI @hasumikin	EN Bazel for Ruby Alex Rodionov @p0deje	JA RuboCop: Modularity and AST Insights Koichi ITO @koic
15:10 - 15:40	Afternoon Break
15:40 - 16:10	JA Speeding up Class#new Aaron Patterson @tenderlove	EN You Can Save Lives With End-to-end Encryption in Ruby Ryo Kajiwara @s01	JA Write you a Barrier - Automatic Insertion of Write Barriers Martin J. Dürst @duerst Joichiro Okoshi @joetake
16:20 - 16:50	JA Making TCPSocket.new "Happy"! Misaki Shioi @coe401_	EN From C extension to pure C: Migrating RBS Alexander Momchilov @amomchilov	JA The Implementations of Advanced LR Parser Algorithm Junichi Kobayashi @junk0612
17:00 - 18:00	EN/JA Lightning Talks

	Main Hall #rubykaigiA	Sub Hall #rubykaigiB	Pearls Room #rubykaigiC
09:50 - 11:00	EN/JA Ruby Committers and the World CRuby Committers @rubylangorg
11:10 - 11:40	EN API for docs Soutaro Matsumoto @soutaro	EN Improving my own Ruby monochrome @s_isshiki1969	EN Running ruby.wasm on Pure Ruby WASM Runtime Uchio KONDO @udzura
11:50 - 12:20	EN Eliminating Unnecessary Implicit Allocations Jeremy Evans @jeremyevans0	EN A taxonomy of Ruby calls Alan Wu @alanwusx	JA The Ruby One-Binary Tool, Enhanced with Kompo ahogappa @ahogappa
12:20 - 14:00	Lunch Break
14:00 - 14:30	EN Toward Ractor local GC Koichi Sasada @ko1	EN Inline RBS comments for seamless type checking with Sorbet Alexandre Terrasa @Morriar	JA Road to Go gem Go Sueyoshi @sue445
14:40 - 15:10	JA Analyzing Ruby Code in IRB tomoya ishida @tompng	EN Optimizing JRuby 10 Charles Nutter @headius	JA Porting PicoRuby to Another Microcontroller: ESP32 Yuhei Okazaki @Y_uuu
15:10 - 15:40	Afternoon Break
15:40 - 16:10	EN Modular Garbage Collectors in Ruby Peter Zhu @peterzhu2118	EN The Challenges of Building sigstore-ruby Samuel Giddins @segiddins	JA On-the-fly Suggestions of Rewriting Method Deprecations Masato Ohba @ohbarye
16:20 - 17:20	JA Keynote Matz Keynote Yukihiro "Matz" Matsumoto @yukihiro_matz