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BundleStats screenshot

Demo: Compare multiple builds, Single build

BundleStats Gatsby plugin

Node version GitHub action CodeQL


- Bundle size and totals by file type(css, js, img, etc)
- Cache invalidation, Initial JS/CSS and other bundle specific metrics
- Assets report (entrypoint, initial, types, changed, delta)
- Modules report (changed, delta, chunks, duplicate count and percentage)
- Packages report (count, duplicate, changed, delta)
:star: Side by side comparison for multiple builds


Analyze webpack stats(bundle size, assets, modules, packages) and compare the results between different builds.

How to install

npm install --dev gatsby-plugin-bundle-stats


yarn add --dev gatsby-plugin-bundle-stats

Available options

See bundle-stats-webpack-plugin options.

Examples of usage

// In your gatsby-config.js
module.exports = {
  plugins: [

or with custom options

// In your gatsby-config.js
module.exports = {
  plugins: [
      resolve: 'gatsby-plugin-bundle-stats',
      options: {
        compare: true,
        outDir: '../artifacts',
        stats: {
          context: './src'

Other packages


npm npm

CLI to generate bundle stats report.


npm npm

Webpack plugin to generate bundle stats report.


npm npm

Next.js plugin for bundle-stats.


In-depth webpack bundle analysis and monitoring

RelativeCI automates webpack bundle analysis, monitoring, and alerting so you can identify and fix bundle regressions before shipping to production:

  • :crystal_ball: Analyze webpack bundle stats on every build
  • :chart_with_upwards_trend: Monitor webpack bundle stats changes and identify tendencies over extended periods
  • :bell: Get notified via GitHub Checks, GitHub Pull Request comments, and Slack notifications
  • :hammer: Support for all major CI services (CircleCI, GitHub Actions, Gitlab CI, Jenkins, Travis CI)
  • :two_hearts: Always free for Open Source

Try for free

:first_quarter_moon: relative-ci/compare

Standalone web application to compare Webpack/Lighthouse/Browsertime stats.

Compare bundle stats

:zap: bundle-stats-action

Github Action that generates bundle-stats reports.

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