What is PLS by page zoom
PLS by page zoom compares Perceived Load Speed (PLS) across different browser zoom levels — including default zoom, zoomed out, and zoomed in. This helps you understand if visual scaling affects how fast users feel the page loads.
PLS (Perceived Load Speed) is Uxify’s real-user performance metric that reflects when the page looks visually ready — including all meaningful elements, not just the largest one. It represents how quickly your users perceive the page as usable.
Zooming in or out can change how content is rendered, reflowed, and visually prioritized in the viewport. It may also affect how quickly elements like images or text blocks are displayed and perceived by users — especially if the layout or breakpoints aren't well optimized.
Healthy PLS by page zoom sample
Should you worry
A healthy PLS by page zoom lens shows consistent performance across zoom levels. Whether users view your page at 100%, zoom out to scan content, or zoom in for readability, the perceived speed should remain in the green zone.
Significantly slower PLS for zoomed-in or zoomed-out users may indicate layout shifts, scaling issues, or content that takes longer to stabilize. These experiences can be frustrating for users who rely on zoom to improve accessibility or focus.
Unhealthy PLS by page zoom sample
When zoomed-in users consistently experience higher PLS, it’s often due to oversized images, improper scaling of content, or reflow delays. Similarly, zoomed-out views may delay perceived readiness if visual hierarchy breaks or elements load inefficiently.
Resolving unhealthy PLS by page zoom
Go-to action plan to resolve an unhealthy PLS by page zoom:
Ask Uxi to analyze your PLS by page zoom and suggest improvements.
Use Filters to focus on slow zoomed-in or zoomed-out segments, and review how the layout renders under different scales.
Simulate LCP of the suspected lens to see if fixing it will resolve the PLS by page zoom. If yes, this is where the resolution focus should be.
Use an automated optimization tool like Navigation AI to improve your PLS by page zoom.
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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