Using useMemo to improve performance

The useMemo Hook is part of the core APIs in React geared toward improving the performance of React applications. It uses a technique known in software development as memoization.

This is an optimization technique used to enhance the performance of software by keeping in memory the results of resource-intensive computation function calls and sending back the cached output when the same inputs are used subsequently. So, why is useMemo important in React application development? useMemo solves two performance problems for a React developer.

Prevents unnecessary component re-rendering

It memoizes the return value of a function for computations that consume a lot of resources by sending back a cached function result upon subsequent requests without a state update.

Let’s dive into a use case for useMemo to better understand how it can be used in React. This snippet shows how a component re-renders on every character search. With a...