Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Towards Ruby 4 JIT / RubyKaigi 2022
Search
Takashi Kokubun
September 08, 2022
Programming
3
10k
Towards Ruby 4 JIT / RubyKaigi 2022
RubyKaigi 2022
Takashi Kokubun
September 08, 2022
Tweet
Share
More Decks by Takashi Kokubun
See All by Takashi Kokubun
Ruby JIT Hacking Guide / RubyKaigi 2023
k0kubun
1
8.8k
YJIT: Dive into Ruby's JIT compiler written in Rust / Rust.Tokyo 2022
k0kubun
1
1.8k
Optimizing Production Performance with MRI JIT / RubyConf 2021
k0kubun
1
330
Why Ruby's JIT was slow / RubyKaigi Takeout 2021
k0kubun
3
1.7k
数時間かかる週一リリースを毎日何度も爆速でできるようにするまで / CI/CD Conference 2021
k0kubun
21
14k
Ruby 3 JIT's roadmap / RubyConf China 2020
k0kubun
0
650
Ruby 3.0 JIT on Rails
k0kubun
9
8.8k
JIT ロードマップ / Ruby 3 さみっと
k0kubun
2
1.2k
JIT compiler improvements in Ruby 2.7 / RubyRussia 2019
k0kubun
0
870
Other Decks in Programming
See All in Programming
TCAの Shared Stateって どういう仕組みになってんの?
yimajo
0
330
Go1.22からの疑似乱数生成器について/go-122-pseudo-random-generator
convto
1
160
TDDと今まで
kanayannet
0
140
OpenAPI を守るのは難しい
ohmori_yusuke
1
140
両面どころかインフラもTSでできるよ ~ 全方位TypeScriptによるプロダクト開発 ~
myfinder
8
2.2k
DocC Tutorial と TCA におけるテスト機能の紹介
kalupas226
1
330
SwiftUI, Jetpack Composeの導入で変化した「家族アルバム みてね」のアプリ開発体験
hicka04
6
390
C# 大統一理論推進委員会 会員のための Unity Package Manager プロジェクト構成案
monry
PRO
0
580
フロントエンドパフォーマンス 入門
shouta2
7
1.5k
Open Source Swift Workshop - Foundation and first party libraries
ikesyo
0
180
上手な探索的テストとその上達方法について
matsu802
4
650
Crafting a Own PHP - ウキウキ手作りミニマリストPHP
uzulla
4
1.1k
Featured
See All Featured
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
mongodb
34
8.8k
It's Worth the Effort
3n
180
27k
JazzCon 2018 Closing Keynote - Leadership for the Reluctant Leader
reverentgeek
178
11k
The Straight Up "How To Draw Better" Workshop
denniskardys
227
130k
Teambox: Starting and Learning
jrom
126
8.4k
Debugging Ruby Performance
tmm1
68
11k
GraphQLの誤解/rethinking-graphql
sonatard
48
9.1k
Scaling GitHub
holman
456
140k
What’s in a name? Adding method to the madness
productmarketing
PRO
14
2.6k
Why You Should Never Use an ORM
jnunemaker
PRO
50
8.6k
What's in a price? How to price your products and services
michaelherold
236
11k
Git: the NoSQL Database
bkeepers
PRO
421
63k
Transcript
Towards Ruby 4 JIT @k0kubun
@k0kubun Maintain: MJIT, Haml, ERB Shopify team
GitHub Sponsors
Haml 6
Introduction to Ruby JIT
How does Ruby JIT work? Ruby
How does Ruby JIT work? 1 + 2 Ruby Abstract
Syntax Tree
How does Ruby JIT work? 1 + 2 putobject 1
putobject 2 opt_plus leave Ruby Abstract Syntax Tree Instruction Sequence (Bytecode)
How does Ruby JIT work? 1 + 2 putobject 1
putobject 2 opt_plus leave Ruby Abstract Syntax Tree Instruction Sequence (Bytecode) Machine Code
How does Ruby JIT work?
CRuby JIT 1: MJIT
CRuby JIT 2: YJIT
Current CRuby JITs speed.yjit.org
Current CRuby JITs speed.yjit.org
Current CRuby JITs • YJIT • Available since Ruby 3.1
• --jit or --yjit • MJIT • Available since Ruby 2.6 • --mjit
Current CRuby JITs • YJIT • Ruby 3.1: x86_64 only,
no code GC, written in C • Ruby 3.2: arm64 support, (hopefully) code GC, written in Rust • MJIT • Ruby 3.1: Stable-ish, portable, native threads, written in C • Ruby 3.2: Experimental, fork + SIGCHLD, written in Ruby
MJIT in Ruby
None
None
mjit.rb: Secret "standard library" in Ruby 3.2 • mjit.rb •
Even more powerful than TracePoint • You can monkey-patch CRuby JIT • No compatibility guarantee • Every module is private, so const_get is required
BYOJ: Bring Your Own JIT
BYOJ: Bring Your Own JIT • Load and pause MJIT
with --mjit=pause • Define RubyVM::MJIT.compile • Use RubyVM::MJIT.const_get(:C) to hack RubyVM • Call RubyVM::MJIT.resume to start JIT With Ruby 3.2:
YJIT-style JIT • Monkey-patch RubyVM::MJIT.compile
MJIT-style JIT • Monkey-patch RubyVM::MJIT::Compiler.compile
MJIT-style JIT
Everyone is writing CRuby JIT
Benchmarking Ruby JIT
yjit-bench
yjit-bench • yjit-bench has three kinds of benchmarks: 1. Headlining
Benchmarks 2. Other Benchmarks 3. Micro Benchmarks
1. Headlining benchmarks • activerecord • hexapdf • liquid-render •
mail • psych-load • railsbench ✉
2. Other Benchmarks • binarytrees, fankuchredux, nbody • chunky_png •
erubi, erubi_rails • lee • optcarrot • rubykon
3. Micro Benchmarks • 30k_ifelse, 30k_methods • cfunc_itself, str_concat •
fib • getivar, setivar • keyword_args • respond_to
None
Benchmark Your Own JIT • ./run_benchmarks.rb -e “/path/to/ruby --any-option” •
Pass multiple -e options to compare different JITs
Towards Ruby 4 JIT
My wish on Ruby 4 JIT • I want Ruby
4 to be as fast as Java or JavaScript • Ruby 4's performance should be a reason to leave Python
None
More Concrete Examples
None
None
None
Ruby 4 Canary • true is mov-ed (immediate) • No
opt_* VM instruction • Constant folding • Ruby / C method inlining
Ruby 4 Canary’ • Single branch instruction to access @one
• Single register to access two • No heap allocation • No stack frame
None
None
Ruby 4 Canary 2 • 5000050000 is mov-ed (immediate) •
Ruby -> C -> Ruby inlining
How can we get there?
Optimization Challenges 1. Constants 2. Variables 3. Method calls 4.
Garbage collection
1. Constants
1. Constants
1. Constants
1. Constants
1. Constants
1. Constants
1. Constants
1. Constants
2. Variables
2. Variables
2. Variables
2. Variables
2. Variables
2. Variables
2. Variables
2. Variables
2. Variables
2. Variables
2. Variables
2. Variables 2021 2022 (tomorrow)
3. Method calls
3. Method calls
3. Method calls
3. Method calls
3. Method calls
3. Method calls
3. Method calls • Code locality • Method inlining: C
㱻 Ruby • Pass arguments with native ABI • Deoptimization on redefinition or interruption (or TracePoint)
4. Garbage collection
4. Garbage collection
4. Garbage collection
Next Steps • We still have a lot of rooms
for improvements on yjit-bench • More cross-instruction optimizations • More method inlining over Ruby and C
Conclusion • Build your own JIT with Ruby 3.2 •
Benchmark your JIT with yjit-bench