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
190
Operating Rails in Kubernetes
kirs
3
400
RailsClub 2016
kirs
2
300
Building a toolkit to detect performance regressions in Ruby on Rails core
kirs
3
5.2k
Развертывание веб-приложений и фреймворк Capistrano
kirs
1
260
Capistrano 3
kirs
4
2.6k
Other Decks in Programming
See All in Programming
XStateでReactに秩序を与えたい
gizm000
0
720
いつか使える ObjectSpace / Maybe useful ObjectSpace
euglena1215
2
130
RAGの回答精度評価用のQAデータセットを生成AIに作らせた話
kurahara
0
240
エンジニア1年目で複雑なコードの改善に取り組んだ話
mtnmr
3
1.9k
Scala におけるコンパイラエラーとの付き合い方
chencmd
2
410
The Shape of a Service Object
inem
0
500
Using Livebook to build and deploy internal tools @ ElixirConf 2024
hugobarauna
0
240
Regular Expressions, REXML, Automata Learning
makenowjust
0
220
Swiftコードバトル必勝法
toshi0383
0
150
Jakarta EE meets AI
ivargrimstad
1
380
マイグレーションコード自作して File-Based Routing に自動移行!! ~250 ページの歴史的経緯を添えて~
cut0
1
260
Hono・Prisma・AWSでGeoなAPI開発
nokonoko1203
5
670
Featured
See All Featured
GraphQLとの向き合い方2022年版
quramy
43
13k
Designing the Hi-DPI Web
ddemaree
278
34k
GitHub's CSS Performance
jonrohan
1029
450k
Robots, Beer and Maslow
schacon
PRO
157
8.1k
The Invisible Side of Design
smashingmag
295
50k
The Brand Is Dead. Long Live the Brand.
mthomps
53
37k
Practical Orchestrator
shlominoach
185
10k
Music & Morning Musume
bryan
46
6k
Rebuilding a faster, lazier Slack
samanthasiow
78
8.6k
Put a Button on it: Removing Barriers to Going Fast.
kastner
58
3.4k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
28
1.6k
How to Think Like a Performance Engineer
csswizardry
16
950
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