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React Performance

Checked
thebushidocollective·vlatest·frontend

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 thebushidocollective/han --skill react-performance -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

thebushidocollective

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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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  • Pinned to a commit: passed

    Scanned thebushidocollective/han at 19caa51d5f.

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Commit
19caa51d5f
Manifest
plugins/frameworks/react/skills/react-performance/SKILL.md
Scanned
1 file, 789 lines
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About this skill

What it does

This skill helps you optimize the performance of React applications by leveraging best practices for building high-performance, scalable user interfaces. It focuses on techniques like React.memo for component memoization to prevent unnecessary re-renders and useMemo for optimizing expensive computations or aggregations within your components. The goal is to improve rendering speed and overall application responsiveness.

When to use it

  • When you notice slow rendering times in specific React components.
  • When dealing with computationally intensive operations that are performed frequently during rendering.
  • To optimize performance when passing props to child components that don't need to re-render on every parent update.
  • For complex data tables or lists where filtering and sorting significantly impact performance.

Key capabilities

  • React.memo for Component Memoization: Prevents unnecessary component re-renders by memoizing the output of functional components. Includes examples with both basic and custom comparison functions.
  • Custom Comparison Functions: Allows fine-grained control over when React.memo should prevent a re-render, based on specific prop changes.
  • useMemo for Expensive Computations: Optimizes expensive calculations (filtering, sorting, aggregations) by memoizing their results and only recalculating them when dependencies change.

Example prompts

  • "How can I use React.memo to prevent re-renders in this component?"
  • "Show me an example of a custom comparison function for React.memo."
  • "Optimize the performance of this data table using useMemo."

Tips & gotchas

  • Overusing React.memo can sometimes introduce more overhead than benefit, so use it strategically where re-renders are demonstrably causing performance issues.
  • Carefully consider which props to include in your custom comparison function for React.memo; incorrect comparisons can lead to unexpected behavior.
  • The code examples provided demonstrate specific techniques; adapt them to fit the structure and logic of your own React components.