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Performance · hard

46. Performance: Debouncing, Throttling & Memoization

Optimizing execution rates and expensive computations.

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Debouncing delays execution until a quiet period elapses. Throttling guarantees execution at most once per interval. Memoization caches pure function outputs by argument.

js
function debounce(fn, ms) {
  let timer;
  return (...args) => {
    clearTimeout(timer);
    timer = setTimeout(() => fn(...args), ms);
  };
}

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Check your understanding

  1. 1. When should you debounce an event handler?

  2. 2. What is the difference between throttling and debouncing?

  3. 3. When is memoization appropriate?

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