INP breakdown

The INP breakdown is one of the Google's PageSpeed insights for the Interaction to Next Paint (INP) metric.

This insight does not impact the performance score, its purpose is to provide site owners with information about the longest interaction in a page.

INP breakdown

Start investigating how to improve INP by looking at the longest subpart.

Understanding INP breakdown

The INP breakdown insight shows the three phases of the longest interaction of a page:

  • Input delay: time between the user interaction and the beginning of the event callbacks.
  • Processing duration: time it takes for event callbacks to be completed.
  • Presentation delay: time until the browser presents the frame with the visual response to the interaction.

Note: Currently, the specific results for the subparts are not displayed in the PageSpeed tests. You can open the Developer Tools > Performance tab, and interact with your site to obtain the values for the INP subparts, like this.

How to improve INP breakdown with WP Rocket

The INP breakdown is an informative insight. To improve the INP metric, use features like Remove Unused CSS and Delay JavaScript execution.

Please refer to the Interaction to Next Paint article to learn more details about what can be done within WP Rocket to improve it, and how WP Rocket could make it worse.

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