What is PLS by device memory
PLS by device memory shows how Perceived Load Speed (PLS) varies depending on how much RAM (memory) a user’s device has.
Device memory affects how quickly a browser can parse, render, and display page elements — especially when multitasking or handling large scripts and assets. This lens helps you understand how users with low, mid, or high RAM experience your site's loading speed.
Healthy PLS by device memory sample
Should you worry
A healthy PLS by device memory lens shows a consistent trend where users with higher memory experience faster PLS, and those with mid-range memory still have acceptable speed.
However, if a significant portion of your users have devices with low RAM (e.g., 1–2 GB) and their PLS is slow, you risk losing those visitors due to perceived sluggishness — even if your average numbers look good overall.
Unhealthy PLS by device memory sample
When users with lower device memory show significantly slower PLS, it typically points to issues with resource-heavy pages, unoptimized images, or large JavaScript payloads. These devices struggle to process and display the full page quickly, making your site feel slow and unresponsive.
Even mid-range memory tiers (e.g., 4 GB) may underperform if too many scripts or DOM elements compete for limited system resources.
Resolving unhealthy PLS by device memory
Go-to action plan to resolve an unhealthy PLS by device memory:
Ask Uxi to analyze your PLS by device memory and suggest improvements.
Use Filters to isolate those memory segments and analyze PLS across key dimensions like page type, country, and interaction.
Simulate LCP of the suspected lens to see if fixing it will resolve the PLS by device memory. If yes, this is where the resolution focus should be.
Use an automated optimization tool like Navigation AI to improve your PLS by device memory.
Once you’ve improved PLS, 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.