Case Study: Reason Digital achieves 10x faster Core Web Vitals with Netlify Edge Functions

Fixing Cumulative Layout Shift (CLS) with Netlify Edge Functions

Reason Digital worked with Netlify to rebuild Blind Veterans UK’s website with a focus on accessibility, security, and flexibility. Their challenge was to create a modern, high-performing site that would be easy for service users to navigate, protect sensitive traffic, and support ongoing feature development without a short shelf life.

Using Netlify alongside 11ty, Reason Digital delivered a Jamstack site with Netlify Edge Functions, Netlify Functions, and CDN-based deployment. Netlify helped eliminate cumulative layout shift for the cookie banner and move search rendering to the edge, while also supporting secure headers and fast previews. The result was a major performance gain, including 2x faster First Contentful Paint, 5x faster Time to Interactive, and 10x faster Largest Contentful Paint, plus Core Web Vitals scores up to 100 for performance and 99 for accessibility.

Reason Digital