Web Performance Metrics: Why INP Is Your Most Practical UX Performance KPI
Every developer has seen this scene: a user clicks a button, nothing happens, they click again—still nothing—and by the third frustrated tap, three overlapping modals explode onto the screen. The page wasn’t slow to load. It was slow to respond. This highlights the importance of perceived performance—how fast and responsive a website feels to users—which can shape user satisfaction regardless of actual load times.