What is PLS by cookie name
PLS by cookie name shows Perceived Load Speed (PLS) across sessions where specific cookies were present. This helps correlate PLS with user states or segment identifiers — like logged-in users, A/B test groups, personalization layers, or consent banners.
Since cookies often control the user experience or trigger certain scripts, they can have a measurable impact on perceived load time.
Healthy PLS by cookie name sample
Should you worry
A healthy PLS by cookie name lens shows consistent or fast perceived load speeds across the most common cookie identifiers. If users with different cookies — such as returning users, experiment groups, or consented states — all experience fast perceived speed, your site is well-optimized across scenarios.
If certain cookies consistently show worse perceived load speed, it’s likely that they’re triggering heavier scripts or altering the page experience in ways that slow it down. This can be due to third-party tools, personalization, A/B test variants, or cookie-consent dependencies.
Spotting these early helps improve the speed of user segments that may otherwise be overlooked.
Unhealthy PLS by cookie name sample
When specific cookie groups show significantly slower PLS compared to the rest, it may be a sign that personalized experiences, consent-based scripts, or alternate versions of the site are degrading performance.
This is especially important when the affected cookies correspond to high-intent users — such as logged-in sessions or shoppers in an experiment — where slower perceived load could impact conversion or satisfaction.
Resolving unhealthy PLS by cookie name
Go-to action plan to resolve an unhealthy PLS by cookie name:
Ask Uxi to analyze your PLS by cookie name and suggest improvements.
Use Filters to narrow down to sessions with slow PLS tied to specific cookies and observe layout behavior or feature differences.
Simulate LCP of the suspected lens to see if fixing it will resolve the PLS by cookie name. If yes, this is where the resolution focus should be.
Use an automated optimization tool like Navigation AI to improve your PLS by cookie name.
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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