War Story: We Ditched Angular 18 for Svelte 5 and Reduced Our 2026 Enterprise App Bundle Size by 58%
A frontend team transitioned from Angular 18 to Svelte 5, resulting in significant performance improvements for their enterprise app. The initial bundle size was reduced by 58%, leading to faster load times and lower costs. This migration allowed them to enhance their app while decreasing code complexity and build times.
- ▪The initial bundle size for the Angular 18 app was 3.2MB, which resulted in a 4.7s first contentful paint on mobile devices.
- ▪After migrating to Svelte 5, the bundle size decreased to 1.34MB, and the first contentful paint improved to 1.1s.
- ▪The migration cut global CDN bandwidth costs by $14,200 per month without increasing infrastructure spending.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3900225) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } ANKUSH CHOUDHARY JOHAL Posted on Apr 28 • Originally published at johal.in War Story: We Ditched Angular 18 for Svelte 5 and Reduced Our 2026 Enterprise App Bundle Size by 58% #story #ditched #angular #svelte In Q3 2025, our 14-person frontend team stared down a 3.2MB initial bundle for our Angular 18 enterprise resource planning (ERP) app — a figure that triggered 4.7s first contentful paint (FCP) on mid-range mobile devices, cost us 12% of our trial user conversions, and left our…
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