Other languages use similar implementations, with results stored as key-value pairs. In JavaScript, that cache is usually a JavaScript object. Memoization always requires at least one cache. Pure functions are fully deterministic and have no side effects. Also, given the nature of memoization, we can only apply it to pure functions. Memoization is best used on functions with expensive computations. As such, using memoization on a cheap function called many times with different arguments is counterproductive. While repetitive function calls benefit from memoization, the feature does have its limitations and should not be used in excess because it uses memory to store all of its results. Memoization is an age-old optimization technique, often encountered at the function level in software and the instruction level in hardware. Let’s examine memoization, these types of React hooks, and when to use them. React developers can apply three types of memoization hooks to their code, depending on which portions of their applications they wish to optimize. ![]() ![]() This enables faster result retrieval when the same function is called again-and it’s a foundational plank in React’s architecture. Memoization is a technique in computer programming in which computational results are cached and associated with their functional input. React memoization is the key to a faster client experience-at the slight expense of using more memory. A one-second delay in load time can result in a 26% drop in conversion rates, research by Akamai has found. It’s critical for developers to create apps that function well.
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