Vercel — AI · · 1 min read

Speed Insights deprecates First Input Delay on November 1st

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Speed Insights is deprecating First Input Delay (FID) and will stop recording new measurements on November 1st.

Speed Insights already uses Interaction to Next Paint (INP), the Core Web Vital that replaced FID, as the responsiveness metric in your Real Experience Score. The deprecation won’t require changes on your side, affect your score, or prevent you from viewing existing FID data.

Learn more in the Speed Insights metrics documentation.

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