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
Micro Performance Improvements
Search
Ernesto Tagwerker
April 26, 2017
Technology
0
55
Micro Performance Improvements
A few changes that you can do to your code to make it have a faster performance
Ernesto Tagwerker
April 26, 2017
Tweet
Share
More Decks by Ernesto Tagwerker
See All by Ernesto Tagwerker
Stuck in the Tar Pit at Sin City Ruby '24
etagwerker
1
250
Lightning Talk: Escaping the Tar Pit
etagwerker
1
110
Fortify Rails Webinar
etagwerker
0
2.2k
Here Be Dragons: The Hidden Gems of Technical Debt
etagwerker
0
190
Lessons Learned from Open Source
etagwerker
0
80
Upgrading Rails: The Dual-Boot Way
etagwerker
1
460
Ruby 3.0 & Rails 6.1
etagwerker
0
170
RubyMem: The Leaky Gems Database for Bundler at Ruby Kaigi Takeout 2020
etagwerker
0
230
Escaping The Tar Pit at NYC.rb
etagwerker
0
94
Other Decks in Technology
See All in Technology
Iceberg Meetup Japan #1 : Iceberg and Databricks
databricksjapan
0
280
LINEギフトにおけるバックエンド開発
lycorptech_jp
PRO
0
180
設計を積み重ねてシステムを刷新する
sansantech
PRO
0
130
Raycast Favorites × Script Command で実現するお手軽情報チェック
smasato
1
120
PHPで印刷所に入稿できる名札データを作る / Generating Print-Ready Name Tag Data with PHP
tomzoh
0
180
次世代KYC活動報告 / 20250219-BizDay17-KYC-nextgen
oidfj
0
460
Helm , Kustomize に代わる !? 次世代 k8s パッケージマネージャー Glasskube 入門 / glasskube-entry
parupappa2929
0
290
抽象化をするということ - 具体と抽象の往復を身につける / Abstraction and concretization
soudai
27
14k
株式会社EventHub・エンジニア採用資料
eventhub
0
4.3k
Perlの生きのこり - エンジニアがこの先生きのこるためのカンファレンス2025
kfly8
1
240
Classmethod AI Talks(CATs) #17 司会進行スライド(2025.02.19) / classmethod-ai-talks-aka-cats_moderator-slides_vol17_2025-02-19
shinyaa31
0
170
OSS構成管理ツールCMDBuildを使ったAWSリソース管理の自動化
satorufunai
0
390
Featured
See All Featured
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
addyosmani
4
360
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
30
2.2k
How GitHub (no longer) Works
holman
314
140k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
175
52k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
666
120k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
30
4.6k
KATA
mclloyd
29
14k
Mobile First: as difficult as doing things right
swwweet
223
9.4k
For a Future-Friendly Web
brad_frost
176
9.6k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
6
570
Building Flexible Design Systems
yeseniaperezcruz
328
38k
RailsConf & Balkan Ruby 2019: The Past, Present, and Future of Rails at GitHub
eileencodes
133
33k
Transcript
Micro Performance Improvements RailsConf, April 2017
Ernesto Tagwerker @etagwerker Founder & Software Developer at Ombu Labs
Best Practices 3
https://github.com/bbatsov/ruby-style-guide
https://speakerdeck.com/sferik/writing-fast-ruby
Bad Code vs. Good Code 6
# Bad return true unless OBJECT.nil? # Good return true
if OBJECT
Benchmark.ips do |x| OBJECT = "nil".freeze x.report("unless nil") do true
unless OBJECT.nil? end x.report("if object") do true if OBJECT end x.compare! end
$ bundle exec ruby benchmarks/unless_nil_vs_if_object.rb Ruby version: 2.3.3 Warming up
-------------------------------------- unless nil 251.994k i/100ms if object 267.552k i/100ms Calculating ------------------------------------- unless nil 9.435M (± 6.9%) i/s - 47.123M in 5.021124s if object 11.431M (± 4.9%) i/s - 57.256M in 5.021363s Comparison: if object: 11431148.2 i/s unless nil: 9435226.8 i/s - 1.21x slower
# OK phone = Hash.new(number: number) phone[:number] # Better Phone
= Struct.new(:number) phone = Phone.new(number) phone.number
$ bundle exec ruby benchmarks/struct_vs_hash.rb Ruby version: 2.3.3 Warming up
-------------------------------------- struct 22.148k i/100ms hash 4.688k i/100ms Calculating ------------------------------------- struct 240.460k (± 2.7%) i/s - 1.218M in 5.069592s hash 47.926k (± 3.9%) i/s - 243.776k in 5.094413s Comparison: struct: 240459.9 i/s hash: 47926.1 i/s - 5.02x slower
# Bad HOUR_6 = Time.parse("2000-01-01 06:00:00 UTC") # Good HOUR_6
= Time.at(946685160).utc
$ bundle exec ruby benchmarks/time/parse_vs_at.rb Ruby version: 2.3.3 Warming up
-------------------------------------- Time.parse 3.287k i/100ms Time.at 66.086k i/100ms Calculating ------------------------------------- Time.parse 34.052k (± 3.2%) i/s - 170.924k in 5.024737s Time.at 842.576k (± 2.2%) i/s - 4.230M in 5.022207s Comparison: Time.at: 842576.2 i/s Time.parse: 34051.9 i/s - 24.74x slower
# Bad Post.select(:id).map(&:id) # Good Post.pluck(:id)
$ bundle exec rake benches:pluck_vs_map Ruby version: 2.3.3 Warming up
-------------------------------------- map(&:id) 11.000 i/100ms pluck(:id) 80.000 i/100ms Calculating ------------------------------------- map(&:id) 124.205 (±11.3%) i/s - 616.000 in 5.026999s pluck(:id) 807.127 (± 2.0%) i/s - 4.080k in 5.057062s Comparison: pluck(:id): 807.1 i/s map(&:id): 124.2 i/s - 6.50x slower
Resources 16
17 https://github.com/ombulabs/benches/ https://github.com/evanphx/benchmark-ips https://github.com/evanphx/benchmark.fyi
Thank you! @etagwerker 18