# aidenybai/react-scan

Scan and fix React performance issues

Repository: https://github.com/aidenybai/react-scan
Canonical: https://ross.abutalabs.com/products/react-scan
Homepage: https://react-scan.com
Language: TypeScript
License: MIT
License Family: permissive
Topics: javascript, react, react-dom, rendering, react-scan
Last push: 2026-08-16T09:23:35+00:00

## Health v2 (maintenance only)
Score: 68/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 40, longevity 52
- inputs: {"age_days": 730, "days_push": 17, "days_rel": 430, "gap_med": 0, "n_releases_24m": 20}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 21799, forks 387 (observed 2026-08-28T04:11:32.095508+00:00)

## What it is
React Scan is a drop-in tool that automatically detects and visually highlights React component performance issues, such as unnecessary re-renders, with no code changes required. It installs via npm or a script tag and provides an on-page toolbar for inspecting which components need optimization.

## Use cases
- find why my react component re-renders too often
- detect react performance issues in my app
- visualize unnecessary re-renders in react
- profile react rendering performance without code changes
- optimize slow react app rendering
- debug react re-render problems

## When to choose
- you want zero-config React performance detection with visual highlighting
- you use React, Next.js, Vite, or Remix and need quick re-render diagnostics
- you prefer a drop-in script or npm package over heavy profiling setups

## When to avoid
- you are not using React or React DOM
- you need full application performance monitoring beyond rendering
- you want static analysis or agent-integrated checks - the maintainers now recommend React Doctor for that

## Facets
- artifact type: library
- maturity: active
- function: monitoring, developer-tools, benchmarking
- domain: frontend, web-development, performance, developer-tools
- platform: browser
- tags: react, rendering-performance, devtools, react-dom, profiling, nodejs, web-server

## Member repositories
- aidenybai/react-scan (main) score 68

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:32.095508+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:57:47.891732+00:00, confidence not recorded.
  - readme: https://github.com/aidenybai/react-scan (fetched 2026-08-28T04:11:32.095508+00:00, sha 70217ed48555)
  - homepage: https://react-scan.com (fetched 2026-08-29T07:56:32.457880+00:00, sha a8efa7c54dd7)
- Data as of 2026-08-30T08:39:29.467469+00:00.