react-perf-check

Detect React performance anti-patterns in JavaScript/TypeScript components.

Updated Aug 23, 2026

Search Tags:#performance #debugging #frontend #react #optimization #memoization #useeffect

Ready to run

npx skills add https://github.com/emanuelrechsteiner/FairSplit --skill react-perf-check

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: react-perf-check
Source: https://github.com/emanuelrechsteiner/FairSplit/tree/main/.claude/skills/react-perf-check
Command: npx skills add https://github.com/emanuelrechsteiner/FairSplit --skill react-perf-check

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Detects common React performance anti-patterns that cause unnecessary re-renders, UI lag, or unexpected behavior. Focus on patterns that are easy to introduce but hard to debug.

Core Features & Use Cases

State/ref conflict identification and guidance to avoid overwriting DOM updates
useEffect dependency management and memoization guidance to reduce unnecessary re-renders
Guidance for expensive calculations and animation performance optimization

Quick Start

Run a local audit of a React codebase to identify performance anti-patterns and generate a prioritized report.

Frequently Asked Questions about react-perf-check

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I find React performance anti-patterns causing unnecessary re-renders?▼

To find React performance anti-patterns causing unnecessary re-renders, run a static analysis audit on your JavaScript or TypeScript files to identify state/ref conflicts, missing memoization, and useEffect dependency issues. This generates a prioritized report of actionable fixes.

Why does my React component UI lag during expensive renders?▼

React component UI lag during expensive renders often stems from unoptimized calculations or missing memoization. Static analysis can detect these expensive render paths and provide guidance on memoization and animation performance optimization to reduce lag.

How do I fix useEffect dependency issues causing unexpected React behavior?▼

To fix useEffect dependency issues causing unexpected React behavior, analyze your component dependencies to ensure proper memoization and dependency management. This prevents overwriting DOM updates and reduces unnecessary re-renders triggered by incorrect dependency arrays.

Does this React performance audit work with TypeScript codebases?▼

Yes, this React performance audit supports TypeScript codebases. It performs static analysis on both JavaScript and TypeScript React files to identify state/ref conflicts, missing memoization, and useEffect dependency issues across typical frontend codebases.

What is the best way to audit a React codebase for memoization issues?▼

The best way to audit a React codebase for memoization issues is to run a local static analysis scan targeting JavaScript and TypeScript files. This identifies missing memoization and useEffect dependency problems, outputting a prioritized report with actionable optimization guidelines.