Tree Shaking and Code Splitting in JavaScript
Tree shaking and code splitting are optimization techniques in JavaScript that help reduce bundle size and improve application performance by removing unused code and splitting code into smaller, on-demand chunks. Large JavaScript bundles can significantly delay time to interactive, especially on lower-end devices and slower networks. Understanding the module graph and using tools to analyze bundle content are critical for identifying and eliminating bloat.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3861766) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Ashish Kumar Posted on May 1 • Originally published at renderlog.in Tree Shaking and Code Splitting in JavaScript #performance #bundling #javascript #codesplitting 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.
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