What is INP by shopping cart
INP by shopping cart shows how Interaction to Next Paint (INP) varies depending on whether the user has items in their shopping cart during a page visit.
This lens is crucial for ecommerce, where cart status often triggers additional scripts, personalized elements, and interactive components that can delay responsiveness.
Healthy INP by shopping cart sample
Should you worry
In a healthy scenario:
Both “with” and “without” cart users experience responsive interactions
Key actions like clicking “Add to cart,” opening menus, or expanding product details are fast regardless of cart state
Personalization logic doesn’t interfere with interactivity
That’s ideal — it means your most engaged shoppers aren’t punished with slower UI just because they’re closer to converting.
Unhealthy INP by shopping cart sample
If INP is slower when items are in the cart:
Cart previews, upsell banners, or dynamic totals might be blocking input readiness
You could be overloading the browser with too much conditional logic or personalization
Third-party scripts that only fire for cart-active users may be dragging down responsiveness
If INP is slower without a cart, your default templates might be bloated or inefficient, which impacts first-time or bounce-prone visits.
Either way, it’s worth digging deeper — INP issues here often directly affect conversion-critical pages.
Resolving unhealthy INP by shopping cart
Go-to action plan to resolve an unhealthy INP by shopping cart:
Ask Uxi to analyze your INP by shopping cart values and suggest improvements.
Use Filters to pinpoint which interactions are slowest for cart users — then check for layout shifts or blocked input.
Simulate INP of the suspected lens to see if fixing it will resolve the INP by shopping cart. If yes, this is where the resolution focus should be.
Use an automated INP optimization tool like INProve to improve your INP by shopping cart 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.