Understanding Interaction to Next Paint and FID Differences

[flora2023]

Interaction to Next Paint (INP) measures the time from when a user interacts with a webpage until the browser visually updates in response. It focuses on the responsiveness of the page to user actions after it loads. In contrast, First Input Delay (FID) measures the delay from a user's first interaction until the browser can process that interaction. While INP assesses overall interaction responsiveness, FID specifically gauges initial interactivity, making both metrics essential for evaluating user experience and performance.

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