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
52
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
0
90
Lightning Talk: Escaping the Tar Pit
etagwerker
0
71
Fortify Rails Webinar
etagwerker
0
1.8k
Here Be Dragons: The Hidden Gems of Technical Debt
etagwerker
0
130
Lessons Learned from Open Source
etagwerker
0
56
Upgrading Rails: The Dual-Boot Way
etagwerker
1
440
Ruby 3.0 & Rails 6.1
etagwerker
0
160
RubyMem: The Leaky Gems Database for Bundler at Ruby Kaigi Takeout 2020
etagwerker
0
110
Escaping The Tar Pit at NYC.rb
etagwerker
0
68
Other Decks in Technology
See All in Technology
マルチアカウント環境への発見的統制の導入
ch1aki
1
1.3k
ServiceNow Knowledge Learning Rise up
manarobot
0
210
リテール金融(キャッシュレス・ネット銀行・ネット証券)の競争環境と経済圏
8maki
0
720
Hands-on Gemini, the Google DeepMind LLM
meteatamel
1
110
MySQL の SQL クエリチューニングの要所を掴む勉強会
andpad
2
6.2k
ServiceNow Knowledge 24の歩き方 EYストラテジー・アンド・コンサルティング
manarobot
0
190
長期間TiDBを使ってきた話 @ 私たちはなぜNewSQLを使うのかTiDB選定5社が語る選定理由と活用LT / Experiences with TiDB Over Time
chibiegg
2
890
プラットフォームってつくることより計測することが重要なんじゃないかという話 / Platform Engineering Meetup #8
taishin
1
350
APIファーストなプロダクトマネジメントの実践 〜SaaSus Platformでの例〜 / "Practicing API-First Product Management - An Example with SaaSus Platform
oztick139
0
100
レガシーをぶっ壊せ。AEONで始めるDevRelの話 / Qiita Night 2024-2-22
aeonpeople
3
1.3k
元インフラエンジニアに成る / Human Resources to Human Relations
bobtani
4
910
アクセシビリティを考慮したUI/CSSフレームワーク・ライブラリ選定
yajihum
2
1k
Featured
See All Featured
"I'm Feeling Lucky" - Building Great Search Experiences for Today's Users (#IAC19)
danielanewman
221
21k
A better future with KSS
kneath
231
16k
Side Projects
sachag
451
41k
The Brand Is Dead. Long Live the Brand.
mthomps
49
28k
Java REST API Framework Comparison - PWX 2021
mraible
PRO
18
6.9k
Clear Off the Table
cherdarchuk
84
310k
Robots, Beer and Maslow
schacon
PRO
155
7.9k
What’s in a name? Adding method to the madness
productmarketing
PRO
16
2.6k
WebSockets: Embracing the real-time Web
robhawkes
59
7k
Bash Introduction
62gerente
604
210k
Gamification - CAS2011
davidbonilla
76
4.6k
Building Flexible Design Systems
yeseniaperezcruz
319
37k
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