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
Concurrency in the imperative and functional world
Search
Scalone
November 17, 2015
Programming
0
160
Concurrency in the imperative and functional world
Presentation created for ITerior 2015 conference check
http://iterior.com.br
Scalone
November 17, 2015
Tweet
Share
More Decks by Scalone
See All by Scalone
TDD - Test Driven Development
scalone
0
3
Ruby, Web and IOT with the same Platform
scalone
0
64
20k mRuby devices in Production
scalone
0
390
DaFunk, IOT Framework in Ruby
scalone
0
150
Concurrency in the imperative and functional world
scalone
0
170
Git e Github
scalone
0
70
Git, o que é, do que é feito, para que serve?
scalone
0
290
DaFunk, IOT Framework in Ruby
scalone
0
170
Uzmenino Marketplace
scalone
0
100
Other Decks in Programming
See All in Programming
PHPとAPI Platformで作る本格的なWeb APIアプリケーション(入門編) / phpcon 2024 Intro to API Platform
ttskch
0
380
Jaspr Dart Web Framework 박제창 @Devfest 2024
itsmedreamwalker
0
140
アクターシステムに頼らずEvent Sourcingする方法について
j5ik2o
6
690
htmxって知っていますか?次世代のHTML
hiro_ghap1
0
410
QA環境で誰でも自由自在に現在時刻を操って検証できるようにした話
kalibora
1
130
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
290
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
760
Fibonacci Function Gallery - Part 2
philipschwarz
PRO
0
210
20241217 競争力強化とビジネス価値創出への挑戦:モノタロウのシステムモダナイズ、開発組織の進化と今後の展望
monotaro
PRO
0
250
menu基盤チームによるGoogle Cloudの活用事例~Application Integration, Cloud Tasks編~
yoshifumi_ishikura
0
150
선언형 UI에서의 상태관리
l2hyunwoo
0
260
iOS開発におけるCopilot For XcodeとCode Completion / copilot for xcode
fuyan777
1
1.4k
Featured
See All Featured
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
98
18k
The Web Performance Landscape in 2024 [PerfNow 2024]
tammyeverts
3
350
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
28
9.2k
Visualization
eitanlees
146
15k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
45
2.3k
Agile that works and the tools we love
rasmusluckow
328
21k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
49k
How STYLIGHT went responsive
nonsquared
96
5.3k
Gamification - CAS2011
davidbonilla
80
5.1k
Optimising Largest Contentful Paint
csswizardry
33
3k
Fontdeck: Realign not Redesign
paulrobertlloyd
82
5.3k
"I'm Feeling Lucky" - Building Great Search Experiences for Today's Users (#IAC19)
danielanewman
226
22k
Transcript
@Scalone Concurrency in the imperative and functional world
Thiago Scalone
[email protected]
@scalone
None
None
None
… nothing new … DISCLAIMER
If you don't understand concurrency… it isn’t problem if doesn't
make part of your day. DISCLAIMER
POINT
Context 1
None
… and the light …
None
None
None
None
None
None
Context 2
None
Concurrency
Concurrency Parallelism
“Dealing a lot of things at once Rob Pike about
Concurrency
“Doing a lot of things at once Rob Pike about
Parallelism
@Scalone
@Scalone
@Scalone
@Scalone
@Scalone
@Scalone
@Scalone
@Scalone
Context 3
Imperative
Imperative
Imperative defines computation as statements that change a program state
Imperative
Imperative
Functional
Functional treats computation as the evaluation of mathematical functions and
avoids state and mutable data
Functional treats computation as the evaluation of mathematical functions and
avoids state and mutable data
Functional treats computation as the evaluation of mathematical functions and
avoids state and mutable data
Functional
Functional
Functional
Functional
Functional
Functional
None
Concurrency
Threads
Thread and Locks
Thread and Locks
Thread and Locks
Thread and Locks
Thread and Locks
Thread and Locks
Thread and Locks
Thread and Locks
Java = Imperative
Thread and Locks I don't know the answer
Thread and Locks Mutable State
Thread and Locks Race condition
Race Condition the output is dependent on the sequence or
timing of other uncontrollable events
Thread and Locks The meaning of life is: 0
None
Thread and Locks The meaning of life is: 0
Thread and Locks
Thread and Locks
Thread and Locks
Thread and Locks
Thread and Locks
Thread and Locks
Thread and Locks
Thread and Locks
Thread and Locks Optimization
Optimization the compiler is allowed to statically optimize your code
by reordering things
Optimization the compiler is allowed to statically optimize your code
by reordering things
Optimization the JVM is allowed to dynamically optimize your code
by reordering things
Optimization the JVM is allowed to dynamically optimize your code
by reordering things
Optimization the hardware you’re running on is allowed to optimize
performance by reordering things
Optimization the hardware you’re running on is allowed to optimize
performance by reordering things
Imperative
Imperative Thread Pool Mutual Exclusion Mutiple Locks - Deadlock Excessive
Contention
Functional
Functional treats computation as the evaluation of mathematical functions and
avoids state and mutable data
Functional treats computation as the evaluation of mathematical functions and
avoids state and mutable data
Functional treats computation as the evaluation of mathematical functions and
avoids state and mutable data
Functional - Bound/Unbound Variable
Functional - Bound/Unbound Variable
Functional - Bound/Unbound Variable
Functional - Bound/Unbound Variable
Functional - Bound/Unbound Variable
Determinism
Determinism - Same In => Same out f(x)
Determinism - Same In => Same out no disk I/O
f(x)
Determinism - Same In => Same out no disk I/O
no random() f(x)
Determinism - Same In => Same out no disk I/O
no side effects no random() always the same result f(x)
Determinism - Same In => Same out no disk I/O
no side effects no random() f(x)
Determinism
Determinism
Determinism 42
Determinism
Determinism + Concurrency
Determinism + Concurrency
Determinism + Concurrency
Determinism + Concurrency
Determinism + Concurrency
Concurrency Models
Actor
Actor
Actor An object which encapsulates state and communicates with other
actors by exchaging messages
Actor accumulator
Actor accumulator
Goroutines and Channels
Goroutines and Channels
Microthreads with a internal scheduler Goroutines and Channels
Goroutines and Channels
Goroutines and Channels
Goroutines and Channels
Goroutines and Channels
Goroutines and Channels
Goroutines and Channels
Goroutines and Channels
Goroutines and Channels
References
References
References
THANK YOU! @Scalone