# reactopt/reactopt

A CLI React performance optimization tool that identifies potential unnecessary re-rendering

Repository: https://github.com/reactopt/reactopt
Canonical: https://ross.abutalabs.com/products/reactopt
Language: JavaScript
License Family: other
Topics: react, developer-tools, react-devtools, react-component, reactjs, javascript, component, optimization, commandline-interface, command-line-interface, commandline, testing, testing-tools, npm, npm-package, npm-module, puppeteer, chromium
Last push: 2018-03-23T21:27:27+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3228, "days_push": 3085, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1973, forks 43 (observed 2026-08-28T04:06:01.039112+00:00)

## What it is
Reactopt is a CLI tool that audits React applications for unnecessary component re-rendering by launching the app in a browser via Puppeteer and analyzing user interactions. It fills the gap left by the deprecated react-addons-perf module, suggesting where shouldComponentUpdate could help.

## Use cases
- find unnecessary re-renders in a react app
- identify components that need shouldComponentUpdate
- audit react component performance from the command line
- replace deprecated react-addons-perf
- profile react app rendering during click and input events

## When to choose
- you maintain a legacy React app (pre-16 era) and want a quick re-render audit
- you prefer a CLI-driven interactive profiling session over browser devtools

## When to avoid
- you need actively maintained tooling - last release was 2018
- you use React 16+ where React DevTools Profiler covers this
- you need React Native support, which was never shipped

## Facets
- artifact type: cli-tool
- maturity: abandoned
- function: developer-tools, testing, benchmarking
- domain: frontend, web-development, developer-tools, performance
- platform: cli, browser
- tags: react, performance-optimization, re-rendering, puppeteer, npm-package, javascript, nodejs

## Member repositories
- reactopt/reactopt (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:01.039112+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 2026-08-30T03:04:59.643115+00:00, confidence not recorded.
  - readme: https://github.com/reactopt/reactopt (fetched 2026-08-28T04:06:01.039112+00:00, sha 106e9433ad12)
  - registry_npm: https://registry.npmjs.org/reactopt (fetched 2026-08-29T10:44:38.751097+00:00, sha 08f79b6cfe62)
- Data as of 2026-08-30T08:39:29.467469+00:00.