What is INP by product
INP by product measures responsiveness at the product page funnel point, tracking Interaction to Next Paint (INP) for user actions such as selecting a size, changing quantity, or clicking “Add to cart.”
Healthy INP by product sample
Should you worry
In a healthy view, all product interactions — like switching variants or opening image zoom — feel instant.
Unhealthy INP by product sample
If INP is slow, main-thread blocking from image swaps, API calls, or variant recalculations may cause lag and reduce conversion rates.
Resolving unhealthy INP by product
Go-to action plan to resolve an unhealthy INP by product:
Ask Uxi to analyze your INP by product values and suggest improvements.
Use Filters to target slow variant changes or “Add to cart” interactions.
Simulate INP of the suspected breakdown to see if fixing it will resolve the INP by product. If yes, this is where the resolution focus should be.
Use an automated INP optimization tool like INProve to improve your INP by product values.
Once you’ve improved INP, set an alert to be the first to know if it starts worsening again.
Try it yourself
Discover how your website performs with real user data.