INP. Get ready for the new Core Web Vital

This post introduces and analyzes Interaction to Next Paint (INP) as a new Core Web Vital, explaining its technical differences from First Input Delay (FID) by measuring input delay, processing time, and presentation delay across all user interactions. It presents data from Cloudflare's RUM-enabled sites comparing FID and INP scores, highlighting INP's greater challenge, especially on mobile devices. The post also details how Cloudflare's Web Analytics and Observatory products can provide INP data and discusses strategies for optimizing INP, including reducing third-party script impact.