Bundle Buddy is a tool to help you find source code duplication across your javascript chunks/splits. This enables you to fine tune code splitting parameters to reduce bundle invalidation rates as well as improve repeat page load performance \o/.
Example Bundle Buddy UI
Bundle Buddy operates on any source maps, but you must include the source content. It will work for any CSS/JS/TEMPLATES etc. that is mapped.
In webpack this means setting devtool to source-map
https://webpack.js.org/guides/development/#source-maps
If you are using webpack, you can also try the bundle-buddy-webpack-plugin. This helps ensure you configure your sourcemaps correctly, and lets you run bundle-buddy directly from a webpack build. You might want to use this if you don't want to use bundle buddy standalone!
npm install -g bundle-buddy
bundle-buddy my-app/public/*.map
When you select a bundle on the left panel, you can then see the bundle breakdown, which shows you the most duplicated source lines across bundles that the currently selected bundle contains.
After clicking on a bundle chunk we will then show you the lines of the source file that are repeated as well as what other bundles contain said source lines.
The ideal workflow flow using Bundle Buddy is to first identify what code is most duplicated across the project's bundles, then to utilize a common code bundling techique (https://webpack.js.org/plugins/commons-chunk-plugin/), then to rebuild your site, and then finally to measure again to see your impact.
Bundle Buddy builds up a mapping across every source map of every file and each line in each file that is used. This enables Bundle Buddy to detect common source lines between different project chunks.
Working on the front end is simple
cd viz
yarn install
yarn startWorking on the CLI component is also straight forward
yarn install
./node_modules/.bin/ts-node index.ts