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
javascriptのGC入門
Search
Taketoshi Aono(青野健利 a.k.a brn)
June 07, 2017
Programming
2
140
javascriptのGC入門
javascriptのGCの特徴やどのように動作するかの解説
Taketoshi Aono(青野健利 a.k.a brn)
June 07, 2017
Tweet
Share
More Decks by Taketoshi Aono(青野健利 a.k.a brn)
See All by Taketoshi Aono(青野健利 a.k.a brn)
document.write再考
brn
6
3k
Parsing Javascript
brn
13
9.1k
JSON & Object Tips
brn
1
440
CA 1Day Youth Bootcamp for Frontend LT
brn
0
870
Modern TypeScript
brn
2
770
javascript - behind the scene
brn
3
710
tc39 proposals
brn
0
830
プロダクト開発とTypeScript
brn
8
2.9k
React-Springでリッチなアニメーション
brn
1
650
Other Decks in Programming
See All in Programming
Java Webフレームワークの現状 / java web framework at burikaigi
kishida
9
2.2k
ML.NETで始める機械学習
ymd65536
0
210
CloudNativePGを布教したい
nnaka2992
0
100
How mixi2 Uses TiDB for SNS Scalability and Performance
kanmo
40
15k
Visual StudioのGitHub Copilotでいろいろやってみる
tomokusaba
1
180
CDK開発におけるコーディング規約の運用
yamanashi_ren01
2
190
Flutter × Firebase Genkit で加速する生成 AI アプリ開発
coborinai
0
160
pylint custom ruleで始めるレビュー自動化
shogoujiie
0
130
なぜイベント駆動が必要なのか - CQRS/ESで解く複雑系システムの課題 -
j5ik2o
12
4.4k
第3回関東Kaggler会_AtCoderはKaggleの役に立つ
chettub
3
1.1k
Pythonでもちょっとリッチな見た目のアプリを設計してみる
ueponx
1
590
バックエンドのためのアプリ内課金入門 (サブスク編)
qnighy
8
1.8k
Featured
See All Featured
Keith and Marios Guide to Fast Websites
keithpitt
411
22k
Art, The Web, and Tiny UX
lynnandtonic
298
20k
Product Roadmaps are Hard
iamctodd
PRO
50
11k
Code Review Best Practice
trishagee
67
18k
Mobile First: as difficult as doing things right
swwweet
223
9.3k
StorybookのUI Testing Handbookを読んだ
zakiyama
28
5.5k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
Faster Mobile Websites
deanohume
306
31k
Documentation Writing (for coders)
carmenintech
67
4.6k
How GitHub (no longer) Works
holman
314
140k
Facilitating Awesome Meetings
lara
52
6.2k
A Modern Web Designer's Workflow
chriscoyier
693
190k
Transcript
javascript Garbage Collector Overview
せ: @brn (ꫬꅿ⨳ⵃ) 耵噟: ؿٗٝزؒٝسؒٝآص،٥iOSؒٝآص، ⠓爡: Cyberagent ،سذؙأةآؔRightSegment٥AI Messenger ـؚٗ:
http://abcdef.gets.b6n.ch/
What is Garbage Collector? Garbage Collectorהכծفؚٗٓي⚥חⶴ䔲גؔـآؙؑزך 灶唱遤ְծًٌٔ걄㚖然⥂׃湫ׅךկ
What is Garbage Collector? var x = { a: 1,
b: 2 } Object Field a Field b Other Objects Heap ًٌٔⶴ䔲ג
What is Heap? Stack ꟼ侧 = ⠓陽 Heap مٙ؎زن٦س 陽✲ꐮ
What is Heap? Stackכꟼ侧⽃⡘דⶴ䔲גծꟼ侧ָ穄✪ׅה荈⹛ד灶唱ׁג׃ת ֲկ Heapכفؚٗٓيָ㶷㖈׃גְכ䌢ח⦼⥂㶷׃גֶֽկ javascriptכ䌢חHeapח⦼ⶴ䔲ג♳ծStackכ湫䱸ׁזְךדծ 罋ִ䗳銲כזְկ
What is Heap? Stack Process Stack Heap Process Stack Heap
Process 饯⹛儗 㹋遤⚥ 㹋遤⚥(㣐ꆀⶴ䔲ג)
What is Heap? OUT OF MEMORY
Garbage Collector 㟓ִֺׅHeapכ铩ַָ䰾ꤐ׃זֽלְֽזְկ ׃גֻךָ Garbage Collector
Garbage Collector ًٌٔⶴ䔲ג var x = {} var y
= {} Heap Global x y
Garbage Collector Garbage CollectorָHeapךⵋ麦〳腉זؔـآؙؑزחو٦ؙ➰ֽ Heap Global x y
Garbage Collector ًٌٔⶴ䔲ג var x = {} var y
= {} y = null Heap Global x y
Garbage Collector Garbage CollectorָHeapךⵋ麦〳腉זؔـآؙؑزחو٦ؙ➰ֽ Heap Global x y
Garbage Collector ًٌٔⶴ䔲ג var x = {}; var y
= {x: x}; x = null y.x = null Heap Global x y
Garbage Collector Garbage CollectorָHeapךⵋ麦〳腉זؔـآؙؑزחو٦ؙ➰ֽ Heap Global x y
Garbage Collector ًٌٔⶴ䔲ג var x = {}; var y
= {x: x}; x = null y = null Heap Global x y
Garbage Collector Garbage CollectorָHeapךⵋ麦〳腉זؔـآؙؑزחو٦ؙ➰ֽ Heap Global x y
Garbage Collector Heap Global x y Garbage CollectorָHeapךو٦ָؙזְؔـآؙؑز灶唱ׅ
Garbage Collector Garbage CollectorָHeapךⵋ麦〳腉זؔـآؙؑزو٦ؙ و و٦ ٦ؙ ؙؿ ؿؑ
ؑ؎ ؎ؤ ؤ(Mark Phase) Garbage CollectorָHeapךⵋ麦♶〳腉זؔـآؙؑز灶唱 أ أؐ ؐ؍ ؍٦ ٦ف فؿ ؿؑ ؑ؎ ؎ؤ ؤ(Sweep Phase)
Garbage Collector ָֿ و و٦ ٦ؙ ؙ، ،ٝ ٝس
سأ أؐ ؐ؍ ؍٦ ٦ف ف(Mark And Sweep) הְֲ،ٕ؞ٔؤيדׅկ
Garbage Collector ׃ծֿךMarkPhaseהSweepPhaseכ ؔـآؙؑزךخٔ٦וךדծفؚٗٓيך؟؎ؤח״גכծ ꬊ䌢ח頾蚚ַַָתׅկ ךծ植㖈ךـٓؐؠדכֿך⹛⡲㼰׃בא遤ֲծ ؎ ؎ٝ ؙٝ
ؙٔ ًٔ ًٝ ٝة ةٕ ٕGC(Incremental GC) הㄎל䩛岀ָ欽ְגְתׅկ זחMark&Sweepדفؚٗٓيָ⨡姺׃ג׃תֲֿה Stop the world הㄎןתׅկ
Incremental Garbage Collection Garbage CollectorָHeapךⵋ麦〳腉זؔـآؙؑزחو٦ؙ➰ֽ Heap Global x y 中断
Incremental Garbage Collection Garbage CollectorָHeapךو٦ָؙזְؔـآؙؑز灶唱ׅ Heap Global x y 中断
Incremental Garbage Collection Incremental GCכMark Phaseך鷿⚥ד撑ָ㢌⻉ׅ〳腉䚍ָ֮ծ ٓ؎زغٔ،(WriteBarrier) ה״לծ撑ָ剅ֹ㢌ֿה嗚濼ׅ➬穈ָ䗳銲חזתׅկ
Incremental Garbage Collection var x = {} var y =
{} y.x = x; Object(x) Heap Object(y) WRITED
Incremental Garbage Collection Garbage CollectorכWriteBarrierח״גو٦ׁؙؔـآؙؑزכ灶唱דֹזְ Heap Global x y 中断
WRITED 削除しない
Incremental Garbage Collection Incremental GCכفؚٗٓيך⨡姺儗䫇ִך،ٕ؞ٔؤيד֮ծ GC荈⡤ך儗כⰋ⡤涸ח⠼ןתׅկ ָծ⡤䠬ך鸞䏝כֶֻ傍ֻ䠬ׄתׅկ
Summary ֿך项俱כꬊ䌢ח邌涸ז铡僇דׅկ 劤勻GCכꬊ䌢ח醱꧟דծ➂겲ך〝兰ך穠兪הדְֲ״ֲזךזךדծ 莆ָ֮倯כה帾ֻ锃ץגגְֻׁկ ֮הծhttps://github.com/authorNari/minigcח449遤ךminiGCהְֲꬊ䌢؝ٝ ػؙزז㹋鄲ָ֮ךדծ鋅גגְֻׁկ ֿך ؖك٦آ؝ؙٖءّٝך،ٕ؞ٔؤيה㹋鄲הְֲ劤ֶָׅׅדׅկ https://www.amazon.co.jp/%E3%82%AC%E3%83%99%E3%83%BC%E3%82%B8%E3%82%B3%E3%83%AC %E3%82%AF%E3%82%B7%E3%83%A7%E3%83%B3%E3%81%AE%E3%82%A2%E3%83%AB
%E3%82%B4%E3%83%AA%E3%82%BA%E3%83%A0%E3%81%A8%E5%AE%9F%E8%A3%85-%E4%B8%AD%E6%9D %91-%E6%88%90%E6%B4%8B/dp/4798025623
׀ ׀幠 幠耮 耮֮ ֮ ָ ָה הֲ ֲ׀ ׀ׂ
ְׂ ְת ת׃ ׃