codexplugin
R

React Component Performance

by Dimillian

Skillcoding3.7K stars

Profile and fix React re-render thrash, slow lists, and expensive render paths

1. Install now

$ npx codex-marketplace add Dimillian/Skills/react-component-performance --skill

2. Verify after restart

“This React list re-renders every second — profile it and isolate the ticking state”

More verify prompts

Get it working

Install → restart → verify. Stay on this page until React Component Performance responds.

  1. 01

    Copy the install command

    Use the command on this page — it includes the correct --skill flag for this skill.

  2. 02

    Run it in your project terminal

    Execute the command from the directory where you use Codex, not necessarily your home folder.

  3. 03

    Restart or reload Codex

    Restart the Codex CLI or reload your IDE window so the new extension is picked up.

  4. 04

    Verify with a prompt

    Try one of the verify prompts below to confirm React Component Performance is active.

Verify it works

After install and reload, paste one of these into Codex.

Prompt 1

> This React list re-renders every second — profile it and isolate the ticking state

Prompt 2

> Reduce re-renders on our dashboard without changing visible behavior

Prompt 3

> Our table lags with 500 rows — suggest memoization and virtualization fixes

If install fails

Fix these common issues before digging into GitHub issues.

  • Command not found or install fails

    Use Node.js 18+ and confirm npx works. Corporate proxies may need HTTPS_PROXY set for GitHub and npm.

  • Installed but Codex ignores it

    Restart the Codex CLI or reload the IDE window. Confirm you used the correct --plugin / --skill / --hook flag.

  • Skill never seems to load

    Ask Codex to use the skill by name in your prompt, or check that the skill appears in your local Codex skills list after install.

Full install & troubleshooting guide

About

Profile and fix React re-render thrash, slow lists, and expensive render paths

React Component Performance is a codex skill — a focused instruction set the agent loads when you need specialized coding help. Skills are lighter than full plugins and install with the --skill flag.

Source package path: Dimillian/Skills/react-component-performance on GitHub (Dimillian/Skills).

Key features

  • Specialized agent instructions for coding tasks
  • Lighter than a full plugin — focused playbook the agent loads on demand
  • Install with the --skill flag via npx
  • Ideal when you want React Component Performance expertise without a full integration

Requirements

  • Node.js 18 or newer with npx available
  • Codex CLI or IDE extension installed and signed in
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