rerenders-audit
Re-renders Audit
Profile React components, identify unnecessary re-renders, and apply the right fix — with a clear explanation of what changed and why it works.
Mental Model First
Re-renders are not inherently bad. React is designed to re-render. The goal is to eliminate unnecessary re-renders — ones where the output would be identical to the previous render.
A component re-renders when:
- Its own state changes
- Its parent re-renders (even if props didn't change)
- A context it consumes changes
- Its key changes
Fixes only help when the re-render is truly unnecessary. Always measure before and after.
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