What is INP by third party
INP by third party shows how different third-party scripts affect Interaction to Next Paint (INP) — the time it takes for your site to respond to user interactions like clicks, taps, and input.
This lens helps you identify which external services — such as chat tools, analytics, personalization engines, or embedded widgets — may be blocking or delaying interactivity on your site.
Only third-party sources that were active and measurable during the selected period are listed.
Why it matters: INP is a key user-centric performance metric. If third-party scripts tie up the main thread or delay responses, users experience friction — even if your content looks like it’s ready.
Healthy INP by third party sample
Should you worry
In a healthy setup, third-party scripts do not degrade responsiveness. They may be present, but they’re either:
Deferred or lazy-loaded.
Running after main interactivity is available.
Optimized to minimize main-thread blocking.
If you’re seeing green INP values across the board — especially for interactive pages — then third parties aren’t harming the user experience.
Unhealthy INP by third party sample
A slow INP caused by third parties is often the result of:
Scripts hogging the main thread and delaying interaction.
Widgets initializing at load (e.g., popups or chat launchers).
Tag managers loading unoptimized scripts too early.
Third-party animations or DOM manipulations during first interaction.
Some common offenders:
Heatmaps and session recording tools.
Chat or customer service widgets.
Poorly optimized personalization or A/B test frameworks.
If these scripts load before or during the user’s first interaction, they can silently wreck your INP — even if everything visually loads on time.
Resolving unhealthy INP by third party
Go-to action plan to resolve an unhealthy INP by third party:
Ask Uxi to analyze your INP by third party values and suggest improvements.
Use Filters to locate problematic script combinations on key templates.
Simulate INP of the suspected lens to see if fixing it will resolve the INP by third party. If yes, this is where the resolution focus should be.
Use an automated INP optimization tool like INProve to improve your INP by third party 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.