Site Performance
Find loading, responsiveness, and layout issues, then verify improvements with the right evidence.
How to Diagnose Interaction to Next Paint (INP) Problems
A page loads quickly, yet opening its menu or applying a filter feels delayed. A load-only test may never exercise that failure. Investigate the interaction itself: what the…
How to Diagnose a Slow Largest Contentful Paint (LCP)
A page’s largest visible element appears late, but compressing the hero image barely changes the result. The delay may occur before the image request starts or after the…
A Practical Workflow for Investigating Core Web Vitals
Use field data to locate the problem, lab tests to reproduce it, and follow-up checks to verify the repair.