How do you break a long task into chunks with setTimeout in JavaScript?
Process a batch of items, then call setTimeout(chunk, 0) to schedule the next batch. This yields to the browser between chunks, letting it render and respond to input. Adjust the chunk size to balance speed and responsiveness.
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More FAQs in Using setTimeout for Performance Optimization in JavaScript
By breaking long tasks into chunks (yielding between chunks), deferring non-critical work until after the browser paints, debouncing input to prevent excessive calls, and throttling rapid events like scroll and resize.
debounce delays the action until the user stops typing for a specified delay. Each keystroke clears the previous timer and sets a new one. The action runs only after the pause, preventing excessive API calls.
requestIdleCallback runs work when the browser is idle (better for low-priority work). scheduler.postTask is a newer API for prioritized scheduling. Web Workers move heavy computation off the main thread entirely.
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