bundle-size-analyzer Skill

bundle-size-analyzer

Analyze and optimize application bundle size to improve download times and memory usage.

Capabilities

Analyze bundle composition
Identify large dependencies
Detect duplicate packages
Suggest tree-shaking opportunities
Generate size reports
Track size over time

Input Schema

{
  "type": "object",
  "properties": {
    "projectPath": { "type": "string" },
    "bundler": { "enum": ["webpack", "vite", "rollup", "esbuild"] },
    "generateReport": { "type": "boolean", "default": true }
  },
  "required": ["projectPath"]
}

Webpack Bundle Analyzer

// webpack.config.js
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;

module.exports = {
  plugins: [
    new BundleAnalyzerPlugin({
      analyzerMode: 'static',
      reportFilename: 'bundle-report.html'
    })
  ]
};

Optimization Techniques

Tree shaking
Code splitting
Dynamic imports
Replace heavy dependencies
Compress assets

Size Targets

| App Type | Target | Acceptable | Too Large | |----------|--------|------------|-----------| | Simple utility | < 30MB | < 60MB | > 100MB | | Standard app | < 80MB | < 150MB | > 250MB | | Complex app | < 150MB | < 250MB | > 400MB |

Related Skills

startup-time-profiler
electron-builder-config

Agent Skills: bundle-size-analyzer

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