How One Engineer Cut CSS Bundle Size by 80 Percent

What this episode covers

In this episode, Lucas and Luna explore how one frontend engineer at a mid-size e-commerce company shrank their CSS bundle from 2.4 megabytes to under 500 kilobytes — without losing any design fidelity. They walk through the specific techniques used: auditing unused styles with PurgeCSS, extracting critical CSS inline, and switching to utility-first classes with Tailwind. The episode breaks down the before-and-after metrics: 80 percent fewer bytes, 1.2 seconds faster time-to-interactive on mobile, and a 15 percent reduction in First Contentful Paint. Lucas explains why CSS bloat is such a common silent performance killer — teams accumulate unused styles over years of feature work — and Luna pushes back on the trade-offs of utility-first CSS, like longer class names in HTML. They also cover how the engineer convinced their team to adopt the change despite initial resistance, using a staging environment diff and Lighthouse score comparisons. The conversation ends with a practical checklist any team can use to audit their own CSS bloat this week. #CSS #FrontendPerformance #WebPerformance #PurgeCSS #TailwindCSS #CriticalCSS #BundleSize #Optimization #Engineering #SoftwareEngineering #WebDev #DevTools #FexingoBusiness #BusinessPodcast #Technology #PerformanceAudit #UtilityFirstCSS #Ecommerce Keep every episode free: buymeacoffee.com/fexingo

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