https://takao.blog/en/tags/bundler/Recent content in Bundler on Commentary of TakaoHugo -- gohugo.ioenCommentary of TakaoSat, 13 Jun 2026 23:11:50 +0900https://takao.blog/en/web/bundle-size-optimization/Tue, 22 Oct 2024 00:00:00 +0900https://takao.blog/en/web/bundle-size-optimization/<img src="https://takao.blog/img/thumnail.webp" alt="Featured image of post JavaScript Bundle Size Optimization: From Analysis to Action" /><p>JavaScript bundle size directly impacts user experience. Larger bundles mean longer download times, slower parsing and compilation, and worse Core Web Vitals. A 100KB increase in JavaScript reduces conversion rates by 2 to 3 percent. Bundle optimization is an ongoing investment, not a one-time fix, and follows a cycle of analysis, identification, optimization, and monitoring.</p> <h2 id="bundle-analysis-tools">Bundle Analysis Tools </h2><p>Understanding what is in your bundle is the first step. webpack-bundle-analyzer provides an interactive treemap visualization that highlights large dependencies and duplicate modules. Vite users can leverage rollup-plugin-visualizer with sunburst and network graphs, while esbuild offers the &ndash;metafile flag for detailed output analysis. source-map-explorer maps compiled code back to source files.</p>