Performance Test: Tailwind 4.0 vs. UnoCSS 0.60 vs. CSS Modules for 100 Component Styles: Bundle Size

When building 100 production-grade React components with equivalent styling, the difference between the smallest and largest bundle size is 142KB – enough to add 1.2 seconds of load time on 3G networks. I ran a controlled benchmark across Tailwind 4.0, UnoCSS 0.60, and CSS Modules to find out which