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
Suspense and TimeSlicing
Search
koba04
June 26, 2018
Programming
0
270
Suspense and TimeSlicing
at ReactJS Tokyo June
https://www.meetup.com/ja-JP/ReactJS-Tokyo/events/251543969/
koba04
June 26, 2018
Tweet
Share
More Decks by koba04
See All by koba04
フロントエンドの現在地とこれから
koba04
10
5.2k
Standing on the shoulders of giants
koba04
0
2.9k
React/Next によるアプリケーション開発のこれから
koba04
61
17k
フロントエンド刷新をプロジェクトとして進める際に気をつけていること
koba04
3
1.9k
How useEvent would change our applications
koba04
1
3.1k
kintoneフロントエンド刷新によるモノリスからの脱却とその先に目指す未来
koba04
3
15k
Make it Declarative with React
koba04
0
1.7k
Ready for React in 2019
koba04
2
1.7k
Algorithms in React
koba04
14
17k
Other Decks in Programming
See All in Programming
AIコーディングエージェント全社導入とセキュリティ対策
hikaruegashira
12
7.2k
バイブコーディング超えてバイブデプロイ〜CloudflareMCPで実現する、未来のアプリケーションデリバリー〜
azukiazusa1
2
700
コーディングエージェント概観(2025/07)
itsuki_t88
0
130
Jakarta EE Meets AI
ivargrimstad
0
270
slogパッケージの深掘り
integral0515
0
120
코딩 에이전트 체크리스트: Claude Code ver.
nacyot
0
990
iOS開発スターターキットの作り方
akidon0000
0
180
マッチングアプリにおけるフリックUIで苦労したこと
yuheiito
0
240
Google I/O Extended Incheon 2025 ~ What's new in Android development tools
pluu
1
110
顧客の画像データをテラバイト単位で配信する 画像サーバを WebP にした際に起こった課題と その対応策 ~継続的な取り組みを添えて~
takutakahashi
4
1.4k
AWS Summit Japan 2024と2025の比較/はじめてのKiro、今あなたは岐路に立つ
satoshi256kbyte
1
240
CDK引数設計道場100本ノック
badmintoncryer
2
560
Featured
See All Featured
Side Projects
sachag
455
43k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
35
2.5k
Gamification - CAS2011
davidbonilla
81
5.4k
Practical Orchestrator
shlominoach
189
11k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
34
3.1k
Learning to Love Humans: Emotional Interface Design
aarron
273
40k
Performance Is Good for Brains [We Love Speed 2024]
tammyeverts
10
990
Building Flexible Design Systems
yeseniaperezcruz
328
39k
Music & Morning Musume
bryan
46
6.7k
Building a Modern Day E-commerce SEO Strategy
aleyda
42
7.4k
The Cost Of JavaScript in 2023
addyosmani
51
8.6k
Become a Pro
speakerdeck
PRO
29
5.4k
Transcript
5JNF4MJDJOHBOE4VTQFOTF 3FBDU+45PLZP+VOF !LPCB
None
3FDBQ3FBDU'JCFS
w 3FBDU'JCFSJTBOVOJUPGXPSL 㲈3FBDU&MFNFOU w *UJTQPTTJCMFUPTUPQBOESFTVNFVQEBUFT 3FDBQ3FBDU'JCFS FiberA FiberB FiberD
FiberE Commit all SideEffects Idle Time Idle Time Idle Time SideEffect SideEffect Host (DOM) FiberC Render Phase Commit Phase
w 3FOEFS1IBTFʜ"TZOD w $PNNJU1IBTFʜ4ZOD 3FDBQ3FBDU'JCFS FiberA FiberB FiberD FiberE Commit
all SideEffects Idle Time Idle Time Idle Time SideEffect SideEffect Host (DOM) FiberC Async Sync
FiberC 4VTQFOEBOE3FTVNF FiberA FiberB FiberA FiberC Commit Low Priority High
Priority Commit FiberA FiberB FiberC Low Priority Reuse Interrupt Suspend Resume
5JNF4MJDJOH
w #MPDLJOH6*UISFBEJTBOBXGVMFYQFSJFODF w 5IFSFBSFNBOZQFPQMFXIPVTFMPXQPXFSEFWJDFT w %FCPVODJOHBOEUISPUUMJOHBSFGPSMPXQPXFSEFWJDFT 5JNF4MJDJOH <AsyncMode> <FilterInput onChange={value
=> { this.setState({value}); requestAnimationFrame(() => this.setState({data: this.filterData(value)}) ); }}
https://github.com/facebook/react/blob/master/packages/react-dom/src/events/SimpleEventPlugin.js
https://react-timeslicing-demo.netlify.com/ Low Priority High Priority
Schedule by React Scheduler
https://github.com/facebook/react/commit/1e3cd332a015e312149efa36eb81c7523411cc2d#diff- bbebc3357e1fb99ab13ad796e04b69a6
%FNP IUUQTSFBDUUJNFTMJDJOHEFNPOFUMJGZDPN IUUQTHJUIVCDPNLPCBSFBDUUJNFTMJDJOHEFNP
4VTQFOTF
8IBUJT4VTQFOTF
https://reactjs.org/blog/2018/03/01/sneak-peek-beyond-react-16.html
w 4VTQFOTFJTBGFBUVSFUPIBOEMFBTZODVQEBUFT w )5513FRVFTU w %ZOBNJDJNQPSU w 1SPNJTFBTBQSJNJUJWF w )BOEMJOHBTZODISPOPVTVQEBUFTBSFTPIBSEʜ
w 4UBSU-PBEJOH "1*4VDDFTT 'BJMVSFʜ w .BOZMPBEJOHTQJOOFST KBOL6*CZGBTUSFTQPOTFT 4VTQFOTF
w /P w 4VQQPSUJOH1SPNJTF$PNQPOFOUEPFTO`UTPMWFQSPCMFNT w )PXEPZPVMJGUVQEFQFOEFODJFTPG1SPNJTF$PNQPOFOUT JOBODFTUPST *T4VTQFOTFTVQQPSUJOH1SPNJTF$PNQPOFOU // How
do you show loading message // until the user list has been fetched? {isLoading ? <Loading /> : <UserListPage />}
)PXEPFT4VTQFOTFXPSL
w 4VTQFOTFJTCBTFEPO&SSPS#PVOEBSJFT UIPVHIXIJDI UISPXT1SPNJTFJOTUFBEPG&SSPS )PXEPFT4VTQFOTFXPSL User Fallback Timeout throw Promise!
(suspend) timeout render with fetched Data (resume)
4JNQMF$BDIF1SPWJEFS
https://github.com/facebook/react/tree/master/packages/simple-cache-provider
Empty Pending Resolved Rejected read or preload throw promise return
value from cache Cache load
)PXUPVTF4VTQFOTF
4VTQFOTF "1*XJMMCFDIBOHFE import SimpleCacheProvider from ‘simple-cache-provider’; const cache = SimpleCacheProvider.createCache();
const userFetcher = id => SimpleCacheProvider.createResource(id => fetch(`/api/users/${id}`).then(res => res.json()); )(cache, id); const User = props => { const user = userFetcher.read(props.id); return <div>{user.name}</div>; }; const Placeholder = props => ( <React.Timeout ms={props.timeout}> {didExpire => didExpire ? props.fallback : props.children} </React.Timeout> ); <Placeholder fallback=“Loading…” timeout={200}> <User id={100} /> </Placeholder>
4VTQFOTF "1*XJMMCFDIBOHFE import SimpleCacheProvider from ‘simple-cache-provider’; const cache = SimpleCacheProvider.createCache();
const routeFetcher = Component => SimpleCacheProvider.createResource(Component => import(Component).then(module => module.default); )(cache, Component); const UserPage = () => { const Component = routeFetcher.read(‘./pages/User’); return <Component />; }; const Placeholder = props => ( <React.Timeout ms={props.timeout}> {didExpire => didExpire ? props.fallback : props.children} </React.Timeout> ); <Placeholder fallback=“Loading…” timeout={1000}> <UserPage /> </Placeholder>
%FNP IUUQTSFBDUTVTQFOTFEFNPOFUMJGZDPN IUUQTHJUIVCDPNLPCBSFBDUTVTQFOTFEFNP
w 4VTQFOTFXJMMCFBWBJMBCMFJOWCZEFGBVMU w 5IFpOBM"1*NJHIUCFDIBOHFE w :PVDBOFYQFSJNFOUJUXJUIBDBOBSZWFSTJPO 4VTQFOTF $ npm install
react@canary react-dom@canary simple-cache-provider
5IBOLZPV TQFBLFSEFDLDPNLPCB