Individual skill

react-component-performance

Analyze and optimize React component performance issues (slow renders, re-render thrash, laggy lists, expensive computations). Use when asked to profile or improve a React component, reduce re-renders, or speed up UI updates in React apps.

react-component-performance/SKILL.md

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Repository stars (not skill ratings): 4,027
Repository last updated: Mar 29, 2026
License: MIT

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design Derived category
engineering Derived category
design-interface Derived category
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# React Component Performance

## Overview

Identify render hotspots, isolate expensive updates, and apply targeted optimizations without changing UI behavior.

## Workflow

1. Reproduce or describe the slowdown.
2. Identify what triggers re-renders (state updates, props churn, effects).
3. Isolate fast-changing state from heavy subtrees.
4. Stabilize props and handlers; memoize where it pays off.
5. Reduce expensive work (computation, DOM size, list length).
6. **Validate**: open React DevTools Profiler → record the interaction → inspect the Flamegraph for components rendering longer than ~16 ms → compare against a pre-optimization baseline recording.