Enhancing React Performance: Mastering Re-render Optimization
summary
Shows a practical pattern that cuts needless re-renders by giving React the same element instance across updates: isolate state and provider inside a ContextWrapper that creates the provider once, lift the expensive UI out of the frequently updating tree, and pass the heavy component down as a child or rendered prop so React reuses the previous fiber node. The demo builds a form plus a flashing heavy component and proves the heavy component stops re-rendering when its element identity is preserved, so performance improves without external libraries.
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