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
250
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
5k
Standing on the shoulders of giants
koba04
0
2.7k
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
1.8k
How useEvent would change our applications
koba04
1
3k
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
1.6k
Ready for React in 2019
koba04
2
1.7k
Algorithms in React
koba04
14
16k
Other Decks in Programming
See All in Programming
GAEログのコスト削減
mot_techtalk
0
120
もう僕は OpenAPI を書きたくない
sgash708
5
1.8k
責務と認知負荷を整える! 抽象レベルを意識した関心の分離
yahiru
4
560
2024年のWebフロントエンドのふりかえりと2025年
sakito
3
250
Bedrock Agentsレスポンス解析によるAgentのOps
licux
3
840
メンテが命: PHPフレームワークのコンテナ化とアップグレード戦略
shunta27
0
120
苦しいTiDBへの移行を乗り越えて快適な運用を目指す
leveragestech
0
620
Amazon ECS とマイクロサービスから考えるシステム構成
hiyanger
2
560
Boost Performance and Developer Productivity with Jakarta EE 11
ivargrimstad
0
300
Immutable ActiveRecord
megane42
0
140
定理証明プラットフォーム lapisla.net
abap34
1
1.8k
Spring gRPC について / About Spring gRPC
mackey0225
0
220
Featured
See All Featured
[RailsConf 2023] Rails as a piece of cake
palkan
53
5.2k
How GitHub (no longer) Works
holman
314
140k
Designing Experiences People Love
moore
140
23k
Art, The Web, and Tiny UX
lynnandtonic
298
20k
Bash Introduction
62gerente
611
210k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
251
21k
The Cult of Friendly URLs
andyhume
78
6.2k
Making Projects Easy
brettharned
116
6k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
47
5.2k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
6
550
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
30
4.6k
Java REST API Framework Comparison - PWX 2021
mraible
28
8.4k
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