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React Performance Optimizer

Checked
erichowens·vlatest·frontend·MIT

Helps with React, performance optimization as part of building frontend UIs and user experiences workflows.

Repository

Install on your platform

Showing Claude Code. One command installs this skill into any of the agents below.

  1. 1

    Run this in your project

    terminal
    $ npx skills add curiositech/some_claude_skills --skill react-performance-optimizer -a claude-code

  2. Uses the open-source skills CLI and needs Node.js. Add -g to install it for your user instead of this project.

What we know about this skill

Publisher

erichowens

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Install target

Live repository

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No human has reviewed this code. The checks below are a static scan of the files at one commit — nobody has run this skill or judged whether it works. A skill runs with whatever access you give your agent, so read the source before you install it.

Automated safety checks

scanned

This skill passed all 6 checks. We read its files at one commit and looked for the things that make a skill dangerous to run — not for whether it works.

  • Declares what it does: passed

    SKILL.md parses and declares a name and a description.

    SKILL.md exists, its frontmatter parses, and it declares a name and a description.

  • No undeclared network calls: passed

    Makes no network calls.

    Every host the skill dials — from its scripts, its config endpoints or the commands it tells the agent to run — is either well-known package and API infrastructure or declared in its own frontmatter. Links in documentation are not counted.

  • No obfuscated payloads: passed

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  • No credential access: passed

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  • Pinned to a commit: passed

    Scanned erichowens/some_claude_skills at 6713fc7a64.

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Commit
6713fc7a64
Manifest
.claude/skills/react-performance-optimizer/SKILL.md
Scanned
1 file, 412 lines
This is a static scan, not a review. It reads the skill's files; it does not run them, and it cannot tell you whether the skill is any good or whether the code does what its description says. A skill runs with whatever access you give your agent.
What each check looks for →

About this skill

What it does

This skill helps diagnose and fix performance issues in React applications, aiming to achieve smooth 60fps experiences. It provides guidance on identifying bottlenecks like slow component re-renders, large lists causing lag, excessive bundle sizes, and janky scrolling or animations. The skill leverages tools and techniques for optimization, including memoization, virtualization, code splitting, and the React Compiler (when available).

When to use it

  • When experiencing slow component re-renders.
  • When working with large lists (over 100 items) that cause lag.
  • If your application's gzipped bundle size exceeds 500KB.
  • When the Time to Interactive is greater than 3 seconds.
  • For applications exhibiting janky scrolling or animations.

Key capabilities

  • Performance Diagnosis: Identifies slow components using the React DevTools Profiler and Lighthouse.
  • Optimization Recommendations: Suggests techniques like memoization, virtualization, and code splitting based on specific issues.
  • Tool Selection Guidance: Recommends appropriate performance tools such as webpack-bundle-analyzer and why-did-you-render.
  • Anti-Pattern Awareness: Highlights common optimization mistakes like premature memoization.
  • React Compiler Integration (2024+): Leverages the React Compiler for automatic optimizations in React 19 and later versions.

Example prompts

  • "My React component is rendering slowly, what should I check?"
  • "How can I optimize a list with over 100 items in my React application?"
  • "My bundle size is too large; how do I reduce it?"
  • “What are some common anti-patterns to avoid when optimizing React performance?”

Tips & gotchas

  • Avoid premature optimization: Don't apply optimizations unless you’ve identified a specific performance bottleneck. Start with the Profiler.
  • Focus on root causes: If your Lighthouse score is low, investigate multiple areas for improvement rather than applying quick fixes.
  • React Compiler (2024+): This skill can leverage automatic memoization through the React Compiler when using React 19 or later.