What is PLS by session duration
PLS by session duration lens breaks down your Perceived Load Speed (PLS) by how long users stay on site. It reveals how fast a page feels to users across session lengths — from instant bounces to long visits.
PLS is Uxify’s proprietary metric that measures how quickly a page feels loaded, based on when all meaningful content is visually rendered — not just one element.
Healthy PLS by session duration sample
Should you worry
If PLS is green across durations, it means users — regardless of how long they stay — feel like the site is loading quickly and smoothly.
Unhealthy PLS by session duration sample
If 0s or 30s buckets show red or yellow, the perception of slowness may be causing users to bounce. If longer durations show degraded PLS, it may indicate issues like delayed secondary content or client-side personalization that appears late.
Resolving unhealthy PLS by session duration
Go-to action plan to resolve an unhealthy PLS by session duration:
Ask Uxi to analyze your PLS by session duration and suggest improvements.
Filter for durations with poor perception and identify device or network patterns.
Simulate LCP of the suspected lens to see if fixing it will resolve the PLS by session duration. If yes, this is where the resolution focus should be.
Use an automated optimization tool like Navigation AI to improve your PLS by session duration.
Once you’ve improved PLS, set an alert to be the first to know if it starts worsening again.
Try it yourself
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