Bundle Size Optimization

Bundle Size Optimization

Table of Contents

• Overview
• When to Use
• Quick Start
• Reference Guides
• Best Practices

Overview

Smaller bundles download faster, parse faster, and execute faster, dramatically improving perceived performance especially on slower networks.

When to Use

• Build process optimization
• Bundle analysis before deployment
• Performance baseline improvement
• Mobile performance focus
• After adding new dependencies

Quick Start

Minimal working example:

// Analyze bundle composition

class BundleAnalysis {
  analyzeBundle() {
    return {
      tools: [
        "webpack-bundle-analyzer",
        "Source Map Explorer",
        "Bundle Buddy",
        "Bundlephobia",
      ],
      metrics: {
        total_size: "850KB gzipped",
        main_js: "450KB",
        main_css: "120KB",
        vendor: "250KB",
        largest_lib: "moment.js (67KB)",
      },
      breakdown: {
        react: "85KB (10%)",
        lodash: "45KB (5%)",
        moment: "67KB (8%)",
        other: "653KB (77%)",
      },
    };
// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Best Practices

✅ DO

• Follow established patterns and conventions
• Write clean, maintainable code
• Add appropriate documentation
• Test thoroughly before deploying

❌ DON'T

• Skip testing or validation
• Ignore error handling
• Hard-code configuration values