<b>Why 200 milliseconds is the INP line in the sand</b>

<b>Why 200 milliseconds is the INP line in the sand</b>

INP — Interaction to Next Paint — measures how fast your page visibly reacts after someone taps or clicks. Google calls anything under 200 milliseconds 'good'.

Why 200? Because that's roughly the point where a delay stops feeling instant and starts feeling laggy to a human. Below it, your brain reads the response as immediate.

Here's the gentle truth: INP records your <i>worst</i> interactions, not the average. One slow button can sink the whole score.

1. Open PageSpeed Insights and check your INP value.
2. If it's above 200, the fix is usually heavy work running when you click.
3. Hunt for big scripts firing on click — search, filters, menus.

Try this: click around your own site and count 'one-Mississippi'. If a menu lags noticeably, that's your INP problem made visible.