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
YJIT Makes Rails 1.7x faster / RubyKaigi 2024
k0kubun
7
8.4k
Ruby JIT Hacking Guide / RubyKaigi 2023
k0kubun
2
9.2k
YJIT: Dive into Ruby's JIT compiler written in Rust / Rust.Tokyo 2022
k0kubun
1
1.9k
Optimizing Production Performance with MRI JIT / RubyConf 2021
k0kubun
1
380
Why Ruby's JIT was slow / RubyKaigi Takeout 2021
k0kubun
3
1.8k
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
710
Ruby 3.0 JIT on Rails
k0kubun
9
8.9k
JIT ロードマップ / Ruby 3 さみっと
k0kubun
2
1.3k
Other Decks in Programming
See All in Programming
AWS CDKにおける「再利用性」を考える / aws-cdk-reusability
gotok365
6
1.3k
AHC035解説
terryu16
0
710
君たちはどうコードをレビューする (される) か / 大吉祥寺.pm
utgwkk
15
8.5k
Polarsの成長: v0.14からv1.0までの変遷と今後の展望
zerebom
1
350
【Go言語】ジェネリクス
tomo1227
0
170
SDCon2024: Enabling DevOps and Team Topologies thru architecture: architecting for fast flow
cer
PRO
0
780
Findy - エンジニア向け会社紹介 / Findy Letter for Engineers
findyinc
2
81k
Modern Angular: Renovation for Your Applications
manfredsteyer
PRO
0
140
Introduction to GitOps
hwchiu
0
110
最近追加した型の紹介とその振り返り
aki19035vc
0
170
Harnessing Large Language Models for Training-free Video Anomaly Detection
tereka114
1
1.3k
Ruby メモリ管理 プログラミング
megmogmog1965
0
130
Featured
See All Featured
Git: the NoSQL Database
bkeepers
PRO
423
64k
Adopting Sorbet at Scale
ufuk
71
8.8k
Building a Scalable Design System with Sketch
lauravandoore
458
32k
Mobile First: as difficult as doing things right
swwweet
219
8.8k
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
17
8.7k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
12
3.8k
Keith and Marios Guide to Fast Websites
keithpitt
408
22k
Optimising Largest Contentful Paint
csswizardry
18
2.6k
How GitHub Uses GitHub to Build GitHub
holman
471
290k
Code Reviewing Like a Champion
maltzj
517
39k
Learning to Love Humans: Emotional Interface Design
aarron
269
39k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
16
1.6k
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