Assets

Asset size: The size of the file produced by webpack

• webpack ignores assets that match excludeAssets webpack stats option
• bundle-stats ignores assets with .map and .LICENSE.txt extensions

Bundle Size

bundle-stats extracts total metrics for each file type(ex: CSS, JS, IMG, Media, Fonts, Html, and Other).

Initial JS

The total size of JavaScript initial chunks

Initial CSS

The total size of CSS initial chunks

Cache Invalidation

The ratio between the total changed assets and total assets size(Bundle Size)

Chunks

The total number of chunks

Assets

Total number of assets

Modules

• webpack ignores modules that match excludeModuleswebpack stats option
• bundle-stats ignores modules that are not bundled into any chunks

Module size: module file size before any production optimization(ex: terser minification)

Modules

The total number of modules bundled by webpack

Duplicate Modules

The total number of modules that belong to more than one chunk

Duplicate Code

The percentage of total duplicate module size from the total module size

Packages

Package size: the total package's module size before any production optimization(ex: terser minification).

Packages

The total number of packages bundled by webpack

Duplicate Packages

The total number of duplicate packages

More resources:

• https://webpack.js.org/glossary/
• https://webpack.js.org/concepts/under-the-hood/