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Rare Earth Juejin Tech Community
Rare Earth Juejin Tech Community
Nov 22, 2022 · Frontend Development

React Scheduler: Implementing Idle‑Time Execution and Time Slicing with requestAnimationFrame, postMessage and MessageChannel

This article explains how React simulates requestIdleCallback by combining requestAnimationFrame, postMessage, and MessageChannel to execute work during browser idle periods, detailing the evolution from the early rAF‑postMessage approach in v16 to the message‑loop implementation in v18 and providing simplified source code examples.

MessageChannelReactTime Slicing
0 likes · 14 min read
React Scheduler: Implementing Idle‑Time Execution and Time Slicing with requestAnimationFrame, postMessage and MessageChannel
Fulu Network R&D Team
Fulu Network R&D Team
Aug 10, 2021 · Frontend Development

Implementing Zero-Delay Timers in JavaScript: Alternatives to setTimeout

This article explores why the native setTimeout cannot achieve a true 0 ms delay, presents a postMessage‑based zero‑timeout implementation, and compares several asynchronous JavaScript techniques—including queueMicrotask, async/await, and MessageChannel—showing their performance advantages over setTimeout.

JavaScriptMessageChannelPerformance
0 likes · 7 min read
Implementing Zero-Delay Timers in JavaScript: Alternatives to setTimeout