Large Angular application bundles can slow down load times and degrade app performance, especially on slower networks. A common cause is unused localization files from libraries like Moment.js, @angular/global, and FullCalendar. These libraries often include support for multiple languages by default, but many applications only require a subset of them.
By removing these unused files, developers have achieved significant reductions in bundle size—up to 35% for Moment.js and 98% for @angular/global—resulting in faster load times and an improved user experience.