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React Rendering and Performance Fundamentals

Explore how React rendering works including the render and commit phases. Learn what triggers re-renders and how to identify unnecessary ones. Understand performance measurement techniques and use React DevTools profiler to optimize component rendering for better app efficiency.

As applications grow, performance becomes a critical concern. At this stage, understanding how React renders components is no longer optional. It becomes essential for building efficient, scalable systems. This lesson builds a mental model of the React rendering process, explains what causes re-renders, and shows how to identify and measure performance issues.

How React renders

React rendering is the process of calculating ...