Performance Optimization Techniques

Implementing code splitting and lazy loading is a key strategy for optimizing JavaScript bundle size in modern web applications. This approach breaks your application into smaller chunks that are loaded on demand, rather than forcing users to download the entire application up front. Benefits include: 1) Faster initial page load as only critical JavaScript is loaded immediately, 2) Reduced memory usage since unused code isn't loaded, 3) More efficient resource utilization, and 4) Better caching opportunities. Modern bundlers like Webpack, Rollup, and Parcel support code splitting through dynamic imports (import()), and frameworks like React, Vue, and Angular provide tools for component lazy loading. Combined with other optimizations like tree shaking, minification, and modern compression, code splitting can dramatically improve application performance.