Tree Shaking and Code Splitting in JavaScript

A 2MB gzipped JavaScript bundle is ~7MB for V8 to parse and compile. On a mid-range Android at 3G, that is 12 seconds before a single interaction is possible. Bundle size is not an abstract metric — it is directly proportional to Time to Interactive on real hardware. Why bundle bloat happens silently: Every convenient import adds to the module graph. moment.js locale files, full lodash imports, icon libraries with 1000 icons — none of these produce visible errors. They just make the app slower o