Goodbye FID, Hello INP: A Deep Dive into Google's New Approach to Web Performance Improvement

How does INP (Interaction to Next Paint) Work?

By incorporating INP into Core Web Vital, Google aims to provide better web performance and user experience.

INP will monitor delays associated with all user interactions on the page (all clicks, taps, and keyboard interactions that occur throughout the lifespan of a user’s visit to a page). INP will evaluate the level of responsiveness by leveraging data obtained from the Event Timing API. Any interaction that leads to the unresponsiveness of a page equates to a bad user experience.

A low INP value signifies that the page was successful in rapidly responding to the entirety, or at least most, of the user interactions.

What is a Good INP Score?

The measurements will have the following thresholds:

1. A page will be considered to have good responsiveness if its Input Delay (INP) is 200 milliseconds or less.
2. If your page's INP is between 200 milliseconds and 500 milliseconds, it means that your page's responsiveness needs improvement.
3. An INP score above 500 milliseconds will mean that your page has poor responsiveness.

How is INP (Interaction to Next Paint)?different from FID (First Input Delay)?

FID:-First Input Delay (FID) tracks the time from when a visitor first interacts with a web page to the time when the browser starts processing the interaction. It is exclusively concerned with the first interaction on a webpage.?

INP:-INP on the other hand, extends beyond mere first interaction. By examining all interactions, it offers a more comprehensive assessment of responsiveness, positioning INP as a more dependable measure of total responsiveness compared to FID.

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