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
Building a toolkit to detect performance regres...
Search
Kir Shatrov
April 22, 2015
Programming
3
5.3k
Building a toolkit to detect performance regressions in Ruby on Rails core
My talk from RailsConf 2015.
Kir Shatrov
April 22, 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
410
RailsClub 2016
kirs
2
300
Performance regressions in Ruby on Rails Core
kirs
0
200
Развертывание веб-приложений и фреймворк Capistrano
kirs
1
260
Capistrano 3
kirs
4
2.6k
Other Decks in Programming
See All in Programming
みんなでプロポーザルを書いてみた
yuriko1211
0
260
AWS Lambdaから始まった Serverlessの「熱」とキャリアパス / It started with AWS Lambda Serverless “fever” and career path
seike460
PRO
1
260
AWS IaCの注目アップデート 2024年10月版
konokenj
3
3.3k
C++でシェーダを書く
fadis
6
4.1k
3 Effective Rules for Using Signals in Angular
manfredsteyer
PRO
0
100
cmp.Or に感動した
otakakot
3
160
LLM生成文章の精度評価自動化とプロンプトチューニングの効率化について
layerx
PRO
2
190
CSC509 Lecture 09
javiergs
PRO
0
140
Remix on Hono on Cloudflare Workers
yusukebe
1
290
Nurturing OpenJDK distribution: Eclipse Temurin Success History and plan
ivargrimstad
0
900
Why Jakarta EE Matters to Spring - and Vice Versa
ivargrimstad
0
1.1k
ふかぼれ!CSSセレクターモジュール / Fukabore! CSS Selectors Module
petamoriken
0
150
Featured
See All Featured
The Pragmatic Product Professional
lauravandoore
31
6.3k
Navigating Team Friction
lara
183
14k
How To Stay Up To Date on Web Technology
chriscoyier
788
250k
Building Flexible Design Systems
yeseniaperezcruz
327
38k
Stop Working from a Prison Cell
hatefulcrawdad
267
20k
10 Git Anti Patterns You Should be Aware of
lemiorhan
654
59k
Designing the Hi-DPI Web
ddemaree
280
34k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
44
2.2k
RailsConf 2023
tenderlove
29
900
What's new in Ruby 2.0
geeforr
343
31k
Making the Leap to Tech Lead
cromwellryan
133
8.9k
Facilitating Awesome Meetings
lara
50
6.1k
Transcript
Kir Shatrov, RailsConf 2015 Building a toolkit to detect 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
None
None
None
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
Full app benchmark before
stackprof by Aman Gupta github.com/tmm1/stackprof
4.2 4.1
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.evilmartians.io 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/ruby/ruby webhook web app docker server benchmark suite
None
github.com/ruby-bench web app docker files benchmark suite
github.com/ruby-bench web app docker files benchmark suite
github.com/ruby-bench web app docker files benchmark suite
github.com/ruby-bench web app docker files benchmark suite
Results
Running builds for Rails
250k builds for Ruby
MRI performance regression caught
What’s next?
What’s next Pull Request benchmarks Weekly reports JRuby support
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
bit.ly/railsperf-gh github.com/rubybench bit.ly/railsperf-static
Thanks! @kirs @kirshatrov @evilmartians evilmartians.com