react-performance
Optimize React Application Performance
React apps can slow down because renders, lists, bundles, images, and heavy computations grow unnoticed. This skill gives practical patterns for diagnosing and reducing those costs.
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Review the Skillstore skill "react-performance" from https://skillstore.io/skills/cjharmath-react-performance.md and its manifest at https://skillstore.io/api/skills/cjharmath-react-performance/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.Your Agent should still show its plan and request any confirmation required by the security policy.
Agent-readable resources
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Test it
Using "react-performance". A dashboard list slows when filters change.
Expected outcome:
The skill would recommend virtualizing rows, memoizing row components, stabilizing callbacks, and profiling before and after changes.
Using "react-performance". A search box triggers expensive filtering on each keystroke.
Expected outcome:
The skill would suggest debouncing input, memoizing filtered data, and measuring render duration in React DevTools.
Using "react-performance". A route bundle delays the first load.
Expected outcome:
The skill would propose splitting heavy routes, lazy loading images, and checking bundle size after the change.
Security Audit
SafeThe static findings are false positives from Markdown examples for React performance patterns. Dynamic imports, a worker example, and NODE_ENV appear only in documentation snippets. No prompt injection, data exfiltration intent, or malicious workflow was found in SKILL.md.
Risk Factors
⚡ Contains scripts (4)
⚙️ External commands (27)
🔑 Env variables (2)
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APA citation
CJHarmath. (2026). react-performance security audit report (audit version 8) [Author version unspecified]. Skillstore. https://skillstore.io/skills/cjharmath-react-performance/audits/8BibTeX citation
@techreport{cjharmath-cjharmath-react-performance-2026,
author = {CJHarmath},
title = {react-performance security audit report (audit version 8)},
institution = {Skillstore},
year = {2026},
number = {8},
url = {https://skillstore.io/skills/cjharmath-react-performance/audits/8},
note = {Author version unspecified}
}CITATION.cff
cff-version: 1.2.0
message: "If you use this Skill, cite its author and this versioned security audit report."
title: "react-performance security audit report (audit version 8)"
version: "unspecified"
type: report
authors:
- name: "CJHarmath"
date-released: "2026-07-06"
url: "https://skillstore.io/skills/cjharmath-react-performance/audits/8"
identifiers:
- type: other
value: "skillstore:cjharmath-react-performance:audit:8"
description: "Skillstore immutable audit report identifier"
Skillstore Score
Why this score Evidence Confidence: HighWhat You Can Build
Tune Complex Lists
Identify when a long list needs virtualization, memoized rows, stable callbacks, and measured scroll performance.
Review Render Patterns
Check a React feature for unnecessary renders before a release or during a performance review.
Reduce Interaction Lag
Plan small changes for slower filters, searches, dashboards, and routes that delay user actions.
Try These Prompts
Review this React component and identify likely unnecessary renders. Suggest the smallest changes first.
Convert this large list view to a virtualization plan. Include item sizing, memoization, and accessibility checks.
Audit these Zustand selectors and component props. Propose selector, shallow comparison, and memoization changes.
Create a prioritized React performance plan for this feature. Cover profiling, bundle splitting, worker offloading, and validation metrics.
Best Practices
- Profile before changing code, then measure the same interaction after each optimization.
- Apply memoization only when props are stable and render cost is meaningful.
- Prefer targeted selectors and virtualized lists before adding broad architectural changes.
Avoid
- Memoizing every value without measuring render cost.
- Passing new objects or callbacks into memoized children on every render.
- Selecting whole stores when components only need one field.