In order to best conform with Rollup recommendations for plugin naming and also provide a more integrated solution this module is no longer active. The new version has many enhancements over this so please switch to it.

Analyze file sizes of rollup bundled imports

Rollup Analyzer gives you a quick look at what's taking up space in your bundle.

Adding as a plugin to your rollup config or build script will print a well formatted analysis to the console upon bundling.

If using Rollup's CLI to bundle with no additonal config, pass -c node:rollup-analyzer-config to print a well formatted analysis to your console.

Full analysis module, giving you access to the complete analysis object or well formatted analysis text for CI and build usage.

$ npm install --save-dev rollup-analyzer-plugin

import analyze from 'rollup-analyzer-plugin'
const opts = {limit: 5, filter: [], root: __dirname}
export default {
  entry: 'module.js',
  dest: 'index.js',
  format: 'cjs',
  plugins: [analyze(opts)]
}

import { rollup } from 'rollup'
const opts = {limit: 5, filter: [], root: __dirname}
import analyze from 'rollup-analyzer-plugin'

rollup({
  entry: 'main.js',
  plugins: [analyze(opts)]
}).then(...)

logged to console on rollup completion

-----------------------------
Rollup File Analysis
-----------------------------
bundle size: 1.146 MB
-----------------------------
file: \node_modules\html5-history-api\history.js
size: 38.502 KB
percent: 3.36%
dependents: 1
  - \app\modules\page.js
-----------------------------
file: \node_modules\pikaday\pikaday.js
size: 34.683 KB
percent: 3.03%
dependents: 1
  - \app\helpers\transformer.js
...

• stdout - optional
  • type: Boolean
  • default: false
  • description: Print to stdout (console.log) instead of stderr (console.error)
• limit - optional
  • type: Number
  • default: null
  • description: Limit number of files to output analysis of, sorted by DESC size
• filter - optional
  • type: Array | String
  • default: null
  • description: Filter to only show imports matching the specified name(s)
• root - optional
  • type: String
  • default: process.cwd()
  • description: Application directory, used to display file paths relatively

MIT © Andrew Carpenter