P75 INP

P75 INP tracks page responsiveness for the slower quarter of user interactions. On scroll-heavy surfaces, watch it around custom scroll handlers, pinned scenes, list loading, section navigation, and controls embedded inside animated sequences.

High P75 INP means the page is making users wait after input. For scrolljacking audits, pair it with rage-scroll rate and early exits so performance data is connected to visible user harm.

How patterns use this KPI

Pattern	How it's instrumented	Why it matters there
Scrolljacking	Page-level p75 Interaction to Next Paint on scroll-heavy pages and controls inside scroll sequences	JS-heavy scroll effects and intercepted input often show up as poor responsiveness.

Related

• Rage-scroll rateShare of sessions with repeated rapid wheel, touch, trackpad, scrollbar, or keyboard-scroll attempts that do not produce meaningful progress.
• Early exit after first scrollShare of sessions that exit, refresh, or go back shortly after the first scroll interaction on a page.