Caching a function's results by arguments to avoid recomputing them

Freeing memory from unused objects by the garbage collector

Saving application state in localStorage between sessions

JavaScript · Middle · Question 16 of 75

What is memoization?

✓Correct answer: Caching a function's results by arguments to avoid recomputing them
2Freeing memory from unused objects by the garbage collector
3Saving application state in localStorage between sessions

Explanation

A memoized function keeps an "arguments → result" Map in a closure. It works for pure functions. Downsides are memory growth and the difficulty of keys for objects (WeakMap is often used).

What is memoization?

Explanation

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