rerender-memo
Optimize React components by memoizing expensive logic and calculations.
Install
mkdir -p .claude/skills/rerender-memo && curl -L -o skill.zip "https://agentskills.codes/api/skills/download/2361" && unzip -o skill.zip -d .claude/skills/rerender-memo && rm skill.zipInstalls to .claude/skills/rerender-memo
Activation
This is the description your AI agent reads to decide when to run this skill — the better it matches your request, the more reliably it fires.
Extract expensive work into memoized components with React.memo. Apply when components perform expensive computations that can be skipped when props haven't changed.Key capabilities
- →Identifies computationally expensive logic in React components
- →Wraps sub-components in React.memo
- →Implements useMemo hooks for specific data chunks
- →Refactors heavy rendering tasks to child components
- →Skips re-renders when props are stable
How it works
Separates heavy operations into memoized child components, allowing React to bypass the parent component's re-render logic.
Inputs & outputs
When to use rerender-memo
- →Optimize component re-renders
- →Memoize expensive calculations
- →Refactor heavy rendering logic
About this skill
Extract to Memoized Components
Extract expensive work into memoized components to enable early returns before computation.
Incorrect (computes avatar even when loading):
function Profile({ user, loading }: Props) {
const avatar = useMemo(() => {
const id = computeAvatarId(user)
return <Avatar id={id} />
}, [user])
if (loading) return <Skeleton />
return <div>{avatar}</div>
}
Correct (skips computation when loading):
const UserAvatar = memo(function UserAvatar({ user }: { user: User }) {
const id = useMemo(() => computeAvatarId(user), [user])
return <Avatar id={id} />
})
function Profile({ user, loading }: Props) {
if (loading) return <Skeleton />
return (
<div>
<UserAvatar user={user} />
</div>
)
}
Note: If your project has React Compiler enabled, manual memoization with memo() and useMemo() is not necessary. The compiler automatically optimizes re-renders.
When not to use it
- →Projects already using React Compiler
- →Micro-optimizing components that are already fast
- →Complex components where state management depends on constant re-evaluation
Prerequisites
Limitations
- →Does not optimize logic if props change constantly
- →Manual refactoring requires developer review
How it compares
It focuses on structural refactoring to enable early return patterns rather than just applying generic memoization.
Compared to similar skills
rerender-memo side by side with the closest alternatives in the catalog.
| Skill | Installs | Updated | Safety | Difficulty |
|---|---|---|---|---|
| rerender-memo (this skill) | 1 | 6mo | No flags | Intermediate |
| react-best-practices | 22 | 3mo | No flags | Intermediate |
| react-component-performance | 2 | 4mo | No flags | Advanced |
| epic-react-patterns | 1 | 6mo | Review | Intermediate |
Try saying
Example prompts that trigger this skill in your AI assistant.
More by TheOrcDev
View all by TheOrcDev →You might also like
react-best-practices
redpanda-data
Client-side React performance optimization patterns.
react-component-performance
Dimillian
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.
epic-react-patterns
epicweb-dev
Guide on React patterns, performance optimization, and code quality for Epic Stack
code-review
xiaoshicae
代码审查（全栈）
audit
Zendevve
Perform comprehensive audit of interface quality across accessibility, performance, theming, and responsive design. Generates detailed report of issues with severity ratings and recommendations.
nextjs-developer
zenobi-us
Expert Next.js developer mastering Next.js 14+ with App Router and full-stack features. Specializes in server components, server actions, performance optimization, and production deployment with focus on building fast, SEO-friendly applications.