React in Depth

3 Optimizing React performance

This chapter covers

• Understanding React rendering
• Optimizing performance using memoization
• Controlling rendering with dependency arrays

Navigating the complex world of React development requires more than just coding skills; it also demands an in-depth understanding of how React components behave and render. Have you ever pondered why a component re-renders or perhaps why it refuses to do so? The answers are often hidden in the subtle interplay of component relationships, state changes, and React’s internal rendering logic.

Dispelling common myths about React rendering is essential. The idea that component re-renders are triggered only by property changes, for example, is a misconception that could lead ...