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
Off the main thread with workers !
Search
Mariko Kosaka
April 27, 2018
Technology
5
1.8k
Off the main thread with workers !
This is a presentation slide I presented at Node学園 in Tokyo on April 27th, 2018
Mariko Kosaka
April 27, 2018
Tweet
Share
More Decks by Mariko Kosaka
See All by Mariko Kosaka
Web標準でつくるガラケーサイト
kosamari
17
8.3k
Evolution of Emoji 🖼🔤✨
kosamari
3
940
Web Platform ... What is it ? (Webプラットフォームのつくり方)
kosamari
2
1.1k
How to build a FIRE
kosamari
2
220
Other Decks in Technology
See All in Technology
Data Hubグループ 紹介資料
sansan33
PRO
0
1.8k
JavaのMCPサーバーで体験するAIエージェントの世界
tatsuya1bm
1
220
本部長の代わりに提案書レビュー! KDDI営業が毎日使うAIエージェント「A-BOSS」開発秘話
minorun365
PRO
6
660
Amazon DevOps Guru のベースラインを整備して1ヶ月ほど運用してみた #jawsug_asa / Amazon DevOps Guru trial
masahirokawahara
3
240
Drawing with LLMs
rist
0
250
バクラクのモノレポにおける AI Coding のための環境整備と {Roo,Claude} Code活用事例 / AI Coding in Bakuraku's Monorepo: Environment Setup & Case Studies with {Roo, Claude} Code
upamune
8
5.4k
Nonaka Sensei
kawaguti
PRO
3
550
今からでも間に合う! 生成AI「RAG」再入門 / Re-introduction to RAG in Generative AI
hideakiaoyagi
1
140
Kubernetesで作るAIプラットフォーム
oracle4engineer
PRO
2
240
Grafana MCP serverでなんかし隊 / Try Grafana MCP server
kohbis
0
310
OpenTelemetry Collector internals
ymotongpoo
5
500
Introduction to Sansan, inc / Sansan Global Development Center, Inc.
sansan33
PRO
0
2.6k
Featured
See All Featured
Save Time (by Creating Custom Rails Generators)
garrettdimon
PRO
31
1.2k
個人開発の失敗を避けるイケてる考え方 / tips for indie hackers
panda_program
106
19k
It's Worth the Effort
3n
184
28k
BBQ
matthewcrist
89
9.7k
ピンチをチャンスに:未来をつくるプロダクトロードマップ #pmconf2020
aki_iinuma
123
52k
A better future with KSS
kneath
239
17k
Practical Orchestrator
shlominoach
188
11k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
48
5.4k
The Language of Interfaces
destraynor
158
25k
Build your cross-platform service in a week with App Engine
jlugia
231
18k
What’s in a name? Adding method to the madness
productmarketing
PRO
22
3.5k
The Invisible Side of Design
smashingmag
299
50k
Transcript
Off the main thread with workers! NodeֶԂ30࣌ݶ @kosamari
@kosamari
ECMAScriptͷۙگใࠂ
ES2018 ݻ·Γ·ͨ͠ ʢਖ਼ࣜʹ5݄ʹυϥϑτ֬ఆͯ͠6݄ʹঝೝ༧ఆʣ
Regex ڧԽ
Ұ൪خ͍͠ͷ Named Capture Groups
const pattern =/(\d{4})-(\d{2})-(\d{2})/u; const result = pattern.exec(‘2018-03-06'); // ! result[0]
=== '2018-03-06' // ! result[1] === '2018' // ! result[2] === '03' // ! result[3] === '06'
const pattern =/(?<year>\d{4})-(?<month>\d{2})-(?<day>\d{2})/u; const result = pattern.exec('2018-03-06'); // ! result.groups.year
=== '2018' // ! result.groups.month === '03' // ! result.groups.day === '06'
ʢେ͞Μͱωλ͕ඃͬͨͷͰ͏Ұͭʣ Lookbehind assertions
const pattern =/(?<=\$)\d+/u; const result = pattern.exec('$42'); // ! result[0]
=== '42'
Object Rest ͱ Sprad ඪ४ʹͳΔΑ
// Rest properties for object destructuring assignment: const person =
{ firstName:’Sebastian', lastName:’Markbåge', country:'USA', state:’CA'}; const{ firstName, lastName, ...rest } = person; console.log(firstName); // Sebastian console.log(lastName); // Markbåge console.log(rest); // { country: 'USA', state: 'CA' }
// Spread properties for object literals: const personCopy ={ firstName,
lastName, ...rest }; console.log(personCopy); // { firstName: 'Sebastian', // lastName: 'Markbåge', // country: 'USA', // state: 'CA' }
Finally, Promise.prototype.finally
fetch(url) .then((response)=> response.text()) .then((text)=>{ element.textContent = text; }) .catch((error)=>{ element.textContent
= error.message; })
fetch(url) .then((response)=> response.text()) .then((text)=>{ element.textContent = text; }) .catch((error)=>{ element.textContent
= error.message; }) .finally(()=>{ hideLoadingSpinner(); });
ChromeͰ ES2018͢Ͱʹશ෦͑·͢ʂ
https://slidr.io/mathiasbynens/what-s-new-in-es2018
Smoosh ࣄ݅
None
Ұिؒ͘Β͍ࣄʹͳΒΜ͔ͬͨ
Break the Web or NOT break the Web
ʮͳΜͱͳ͘ഉଞతʯ όογϯά
https://github.com/tc39/tc39-web-draft
Off the main thread with workers! NodeֶԂ30࣌ݶ @kosamari
݁શ͘ग़͍ͯ·ͤΜ ͜Μͳಈ͖͕͋ΔΑ͍ͬͯ͏ΞοϓσʔτͰ͢
ϑϩϯτΤϯυͰΨϦΨϦίʔυಈ͔͢ͱɺϖʔδॏ͘ͳΔΑͶʁ TL;DR
ϑϩϯτΤϯυͰΨϦΨϦίʔυಈ͔͢ͱɺϖʔδॏ͘ͳΔΑͶʁ ͦ͜Worker͍ͬͯ͏ศརͳͷ͕…ʢΑͬ͠ΌʔΔ͔ʔʣ TL;DR
ϑϩϯτΤϯυͰΨϦΨϦίʔυಈ͔͢ͱɺϖʔδॏ͘ͳΔΑͶʁ ͦ͜Worker͍ͬͯ͏ศརͳͷ͕…ʢΑͬ͠ΌʔΔ͔ʔʣ ͋ΕɺWorkerͷ͍͘͢͝ʹ͘͘ͳ͍ʁ TL;DR
ϑϩϯτΤϯυͰΨϦΨϦίʔυಈ͔͢ͱɺϖʔδॏ͘ͳΔΑͶʁ ͦ͜Worker͍ͬͯ͏ศརͳͷ͕…ʢΑͬ͠ΌʔΔ͔ʔʣ ͋ΕɺWorkerͷ͍͘͢͝ʹ͘͘ͳ͍ʁ ͍͘͢͢ΔʹͲ͏͢Εྑ͍ΜͩΖ͏…ʢ͝ҙݟืूதʣ TL;DR
ͦͦWorkerͱ
Data DOMͰग़དྷͯΔ ϒϥβ ϒϥβ͔Βଧ্ͪ͛ΒΕͨ WebWorker
const worker = new Worker('worker.js');
const worker = new Worker('worker.js'); worker.postMessage(data); self.onmessage = (message) =>
{ // do something
const worker = new Worker('worker.js'); worker.postMessage(data); self.onmessage = (message) =>
{ // do something self.postMessage(data) }
const worker = new Worker('worker.js'); worker.postMessage(data); worker.onmessage = (message) =>
{ // do something on main thread }; self.onmessage = (message) => { // do something high cost self.postMessage(data) }
ͳͥϚϧνεϨου͕ඞཁʁ ͦͦϒϥβͰඇಉظॲཧ͡Όͳ͍ͷʁ Promise͢ΔΜ͡Όͳ͍ͷʁ
࠷ۙͷΣϒΞϓϦΈΜͳ JSONσʔλΛΰχϣΰχϣ͔ͯ͠ΒDOMʹө
✔ Network
✔ Network ✔ DOM
✔ Network ✔ DOM ✗ data processing
✔ Network ✔ DOM ✗ data processing ͜Ε͕ංେԽͯ͠Δͷ͕
Does anyone like programming with workers?
ݴΘΕͯΈͨΒ…͜Εͷ͍͍ͮ͢͝Β͍ͳɻ (શʹετοΫϗϧϜީ܈ʹͳͬͯͨ)
WebWorkerπϥΠɹͦͷ̍ɿ WebWorkerΛ͏·͘͏ʹ εϨουϓʔϧతʹ εέδϡʔϥʔΛࣗͰ࣮͠ͳ͍ͱ͍͚ͳ͍
A JavaScript Scheduler API by Justin (2લͷΞΠσΞ)
Parallel JSϓϩϙʔαϧࣦʢ.NETͷPLINQΈ͍ͨͳͷʣ
WebWorkerΛྑ͍ͨ͘͠ɹٞ̍ɿ C#ͱ͔RxKotlinΈ͍ͨʹ͏·࣮͘ʁ Erlangૣ͍Β͍͠…
WebWorkerπϥΠɹͦͷ̎ɿ postMessageͰσʔλΓऔΓ͢Δͷ͕େม
postMessage({…}) postMessage({…})
SharedArrayBuffer
https://webkit.org/blog/7846/concurrent-javascript-it-can-work/
Transferable Streams
importScripts('vp10decode.js', 'mp4encode.js'); const transcoder = new TransformStream({ transform(chunk, controller) {
const decoded = vp10decode(chunk); controller.enqueue(mp4encode(decoded)); } }); postMessage(transcoder, [transcoder]); const worker = new Worker('transcode.js'); worker.onmessage = event => { const transcoder = event.data; await fetch('bunny.vp10') .pipeThrough(transcoder) .pipeTo(videoSink); };
WebWorkerΛྑ͍ͨ͘͠ɹٞ̎ɿ postMessageͷAPIΛநԽ͍ͯ͘͢͠
https://github.com/GoogleChromeLabs/comlink
https://github.com/GoogleChromeLabs/clooney
WebWorkerΛྑ͍ͨ͘͠ɹٞ̏ɿ εϨʔυϓʔϧϞσϧͱϝϞϦγΣΞϞσϧ ૬ੑ͕ྑ͘ͳ͍
WebWorkerπϥΠɹͦͷ3ɿ ͦͦWebWorkerͬͯϑΝΠϧΛ ผ͚ͳ͖Ό͍͚ͳͯ͘ΊΜͲ͍͘͞
JavaScript Tagged Blocks
WebWorkerΛྑ͍ͨ͘͠ɹٞ̐ɿ εϨουϞσϧʁͦΕͱλεΫϞσϧʁ
εϨουΒͬͨθʂ ͣͬͱฦ͞ͳ͍ζϥʂ C++ ࣄऴΘͬͨͳΒ returnฦͯ͠Αʙ
ϚϧνεϨουͰͷΣϒΞϓϦ։ൃ ͲΜͳ;͏ʹϓϩάϥϜॻ͖͍ͨͰ͔͢ʁ
ݴޠ༷VMͷߏ͔Βม͑ΒΕΔͱͨ͠ Ͳ͏͍ͨ͠Ͱ͔͢ʁ
ͥͻ͝ҙݟ͍ͩ͘͞ɻ Thanks ! @kosamari