Poor INP

INP measures how quickly the page responds to input. Poor INP makes a site feel laggy.

What it is

This check flags pages whose Interaction to Next Paint exceeds the recommended threshold (good is under 200 ms).

Why it matters for SEO

INP replaced FID as a Core Web Vital; slow interactivity frustrates users and is a ranking-relevant signal.

Example

INP - 540 ms   (good: < 200 ms)

How to fix

1. Break up long JavaScript tasks and defer non-critical work.
2. Reduce main-thread work and third-party scripts.
3. Use web workers for heavy computation.
4. Re-test responsiveness after changes.

Related checks

• Heavy page
• Poor CLS
• Poor LCP
• Privacy-friendly analytics & real-user Core Web Vitals

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