whatisgithub

What is reactopt?

gaearon/reactopt — explained in plain English

Analysis updated 2026-07-17 · repo last pushed 2017-11-30

★ 9JavaScriptAudience · developerComplexity · 2/5DormantSetup · easy

In one sentence

A command-line tool that watches your React app while you use it and reports which components re-render more than they need to, so you know what to optimize.

Mindmap

mindmap
  root((repo))
    What it does
      Watches React app
      Tracks re-renders
      Generates audit report
    Tech stack
      JavaScript
      React
      CLI
    Use cases
      Find slow components
      Optimize dashboards
      Speed up chat apps
    Audience
      React developers
      Performance tuners

Code map

Detail Auto

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filefunction / class

What do people build with it?

USE CASE 1

Run it against a sluggish React dashboard to find which components re-render too often.

USE CASE 2

Audit a real-time chat app to spot components wasting cycles on message updates.

USE CASE 3

Get a report suggesting where to add shouldComponentUpdate to cut unnecessary renders.

What is it built with?

JavaScriptReactCLI

How does it compare?

gaearon/reactoptabivan-tech/zvec-mcpardupilot/dronecan-webtools
Stars999
LanguageJavaScriptJavaScriptJavaScript
Last pushed2017-11-30—2025-09-02
MaintenanceDormant—Quiet
Setup difficultyeasymoderatemoderate
Complexity2/53/53/5
Audiencedeveloperdeveloperops devops

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 30min

Requires importing it into your app and running it against a locally running instance.

No license information was found in the explanation.

Copy-paste prompts

Prompt 1
Help me install Reactopt in my React project and point it at my local dev server.
Prompt 2
Explain the Reactopt audit report I got and tell me which components to fix first.
Prompt 3
Show me how to add shouldComponentUpdate to a component Reactopt flagged as over-rendering.

Frequently asked questions

What is reactopt?

A command-line tool that watches your React app while you use it and reports which components re-render more than they need to, so you know what to optimize.

What language is reactopt written in?

Mainly JavaScript. The stack also includes JavaScript, React, CLI.

Is reactopt actively maintained?

Dormant — no commits in 2+ years (last push 2017-11-30).

What license does reactopt use?

No license information was found in the explanation.

How hard is reactopt to set up?

Setup difficulty is rated easy, with roughly 30min to a first successful run.

Who is reactopt for?

Mainly developer.

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