Why should you defer non-critical work with setTimeout in JavaScript?
So the browser can paint the UI immediately and respond to user input. Non-critical work like analytics, logging, and preloading can run after the paint, improving perceived performance without blocking the user experience.
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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.
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.
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.
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