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
Performance regressions in Ruby on Rails Core
Search
Kir Shatrov
September 27, 2015
Programming
0
200
Performance regressions in Ruby on Rails Core
Slides for my Railsclub Moscow 2015 talk.
Kir Shatrov
September 27, 2015
Tweet
Share
More Decks by Kir Shatrov
See All by Kir Shatrov
Running Jobs at Scale
kirs
1
200
Operating Rails in Kubernetes
kirs
3
420
RailsClub 2016
kirs
2
300
Building a toolkit to detect performance regressions in Ruby on Rails core
kirs
3
5.4k
Развертывание веб-приложений и фреймворк Capistrano
kirs
1
270
Capistrano 3
kirs
4
2.7k
Other Decks in Programming
See All in Programming
EC2からECSへ 念願のコンテナ移行と巨大レガシーPHPアプリケーションの再構築
sumiyae
3
580
混沌とした例外処理とエラー監視に秩序をもたらす
morihirok
13
2.2k
KMP와 kotlinx.rpc로 서버와 클라이언트 동기화
kwakeuijin
0
300
AppRouterを用いた大規模サービス開発におけるディレクトリ構成の変遷と問題点
eiganken
1
440
DMMオンラインサロンアプリのSwift化
hayatan
0
180
ATDDで素早く安定した デリバリを実現しよう!
tonnsama
1
1.8k
ある日突然あなたが管理しているサーバーにDDoSが来たらどうなるでしょう?知ってるようで何も知らなかったDDoS攻撃と対策 #phpcon.2024
akase244
2
7.7k
Rubyでつくるパケットキャプチャツール
ydah
0
170
PHPで作るWebSocketサーバー ~リアクティブなアプリケーションを知るために~ / WebSocket Server in PHP - To know reactive applications
seike460
PRO
2
770
Оптимизируем производительность блока Казначейство
lamodatech
0
950
技術的負債と向き合うカイゼン活動を1年続けて分かった "持続可能" なプロダクト開発
yuichiro_serita
0
300
テストコードのガイドライン 〜作成から運用まで〜
riku929hr
7
1.4k
Featured
See All Featured
Six Lessons from altMBA
skipperchong
27
3.6k
Speed Design
sergeychernyshev
25
730
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
33
2k
Typedesign – Prime Four
hannesfritz
40
2.5k
Git: the NoSQL Database
bkeepers
PRO
427
64k
GraphQLの誤解/rethinking-graphql
sonatard
68
10k
Designing for humans not robots
tammielis
250
25k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
365
25k
Making Projects Easy
brettharned
116
6k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
28
2.2k
Documentation Writing (for coders)
carmenintech
67
4.5k
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
49
2.2k
Transcript
RAILSCLUB 2015 Kir Shatrov Performance regressions in Ruby on Rails
core
@kirs @kirshatrov !"
None
Catching Performance Regressions in Rails
What’s a performance regression?
What’s a performance regression in Rails?
Page load 250ms → 4s
Case Study
4.2rc1
None
2 times slower
4.2rc3
Faster framework = Faster app
Examples from Rails commits
Metrics
Timing & Allocations
Faster Methods = Faster App
start = Time.now.to_f sleep 5 ends = Time.now puts "it
took #{ends - start}"
Allocations = GC work Less allocations = less GC work
before = GC.stat[:total_allocated_object] 10_000.times do { "key" => "value" }
end after = GC.stat[:total_allocated_object] puts "allocated: #{after - before}"
Basic primitives
Examples from Rails commits String
None
None
None
None
None
None
None
None
None
None
Examples from Rails commits Hash
None
None
None
None
None
None
Optimize only “hot” code
Track the changes
The Idea to build a service
Track it with benchmarks
Any existing benchmarks?
None
Setup Discourse Populate records Start Unicorn with RAILS_ENV=production Make requests
with Apache Bench to the list of endpoints Print timings and memory usage
Components to benchmark activerecord activemodel actionview actioncontroller activesupport
3.2 – 4.0 – 4.1 – 4.2
higher is faster
higher is faster
higher is faster
None
ActiveRecord Finders require_relative 'support/activerecord_base.rb' require_relative 'support/benchmark_rails.rb' User.create!(name: 'kir', email: '
[email protected]
')
m = Benchmark.rails(100, "activerecord/#{db_adapter}/finders") do User.find(1) end puts m.to_json
Disable GC is necessary Warm up the code Make N
iterations Calculate the mean timing and object allocations
ActiveRecord::Base#create require_relative 'support/activerecord_base.rb' require_relative 'support/benchmark_rails.rb' fields = { name: "Kir",
notes: "Note", created_at: Date.today } Benchmark.rails(1000, "activerecord/#{db_adapter}/create") do Exhibit.create(fields) end
Correct benchmarks
Full app benchmark higher is faster
Full app benchmark before higher is faster
stackprof by Aman Gupta github.com/tmm1/stackprof
config/environments/production.rb
Full app benchmark after
✅ Benchmarks
None
None
The Service
What do we want? See benchmark for every commit See
benchmark for every PR Report to PR author (“activerecord became 2% slower”) See charts
railsperf The prototype of the service. Built in January
rubybench.org by Sam Saffron and Guo Xiang Tan “Alan”
None
3.6GHz Intel® Xeon® E3-1270 v3 Quad-Core 4 x 8GB Micron
ECC Samsung SSD 845DC EVO - 240 GB Sponsored hardware
ruby-bench + rails
github.com/rails/rails webhook web app docker server benchmark suite
None
github.com/ruby-bench web app docker files benchmark suite
Results
Running builds for Rails
Performance regressions caught
Overview What is a performance regression How to track them
How to solve them How to write benchmarks Automate tracking!
How to track your app performance? Study how do Ruby
objects work and how to treat them Write a Discourse-like benchmark and run it on Travis Subscribe to Rails Weekly
Ruby Under a Microscope
http://bit.ly/writing-fast-ruby
How to track your app performance? Study how do Ruby
objects work and how to treat them Write a Discourse-like benchmark and run it on Travis Subscribe to Rails Weekly
Setup the app Populate records Start Unicorn with RAILS_ENV=production Make
requests with Apache Bench to the list of endpoints Print timings and memory usage
How to track your app performance? Study how do Ruby
objects work and how to treat them Write a Discourse-like benchmark and run it on Travis Subscribe to Rails Weekly
Спасибо! @kirs @kirshatrov @evilmartians evilmartians.com