![]() It should be used when you have a component that is not being changed very often, but must still be re-rendered when the props change. By memoizing components, mo can reduce the number of unnecessary re-renders, resulting in better application performance. mo is a powerful tool for improving React performance. This will tell React whether or not to re-render the component. The comparison function should return true if the props have not changed, and false if they have. This function will be used to compare the props and determine whether or not the component should be re-rendered. With mo, you can also pass a second argument, which is a comparison function. To use it, you just need to wrap your component with the mo higher order component. Using mo to optimize React performance is simple. It would be hard to replace one with another since they have different purposes. useMemo is for memoizing function's calls inside functional component. React does a shallow comparison of prop values. In this case, wrapping the component with mo would be a good idea, as it would reduce the number of unnecessary re-renders. mo allows functional component to have same optimization as PureComponent provides for class-based components. mo React does an initial render of the component when it first loads and stores it in memory. Now you can do the same with function components by wrapping them in mo. This can be useful in situations where you have a component that needs to be re-rendered, but the props are not changing very often.įor example, if you have a component that displays the current time, you don't need to re-render it every second, as the props never change. mo Class components can bail out from rendering when their input props are the same using PureComponent or shouldComponentUpdate. mo should be used when you have a component that is not being changed very often, but must still be re-rendered when the props change. This can be a great way to improve React performance, as it reduces the amount of unnecessary re-renders. This means that React will only re-render the component when the props have changed, not on every update. mo is a higher order component (HOC) that wraps a component and memoizes the result. This article will explore how mo can be used to improve React application performance. mo is a higher order component (HOC) that helps to optimize React performance by memoizing components, so that React only re-renders components when the props have changed. Perfectly normal React code, and React is doing its job with the virtualDOM to determine what should actually change in the real DOM, and in the case of Button - nothing. ![]() Its re-renders result into no DOM changes, and it is also very cheap to call again and again to such a simple component with that probably has little to no internal logic. As React applications grow in size and complexity, its performance can suffer due to inefficient re-rendering of components. Perfectly normal React code, and React is doing its job with the virtualDOM to determine what should actually change in the real DOM, and in the case of Button - nothing.
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