Instruction: Describe the React Fiber architecture and its impact on application performance.
Context: This question evaluates the candidate's knowledge of React's Fiber architecture, focusing on its implementation and benefits for performance optimization.
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Fiber is React's reimplementation of its core algorithm. It's designed as an incremental reconciliation algorithm, which is a fancy way of saying it can prioritize, pause, and resume work as needed. This stands in contrast to React's previous reconciliation algorithm, which was more linear and less flexible.
One of the primary ways Fiber enhances performance is through what is known as "time slicing." This feature allows React to break the rendering work into chunks and spread them out over multiple frames. By doing so, React can ensure that the browser remains responsive to user inputs and other tasks, even during heavy rendering...