What is CLS by device memory
CLS by device memory shows Cumulative Layout Shift (CLS) values across different levels of device memory (e.g. 4GB, 8GB). This lens helps you understand whether layout stability is worse on less powerful or older hardware.
The list includes only device memory types from users who visited your website during the selected period.
Lower memory devices often struggle to render complex layouts smoothly, especially when there are animations, images loading late, or scripts reordering elements — all of which can lead to higher CLS.
Healthy CLS by device memory sample
A healthy view will show all green. Some memory groups may vary slightly, but as long as there’s no yellow or red, layout shifts are under control.
Unhealthy CLS by device memory sample
If you see red in 4GB or even 8GB devices, users are experiencing visible layout jumps. This directly affects how trustworthy and usable your site feels — especially during load or scroll events.
Resolving unhealthy CLS by device memory
Go-to action plan to resolve an unhealthy CLS by device memory:
Ask Uxi to analyze your CLS by device memory values and suggest improvements
Use Filters to isolate slow device memory values and see where the layout shifts are worst.
Simulate CLS of the suspected lens to see if fixing it will resolve the CLS by device memory. If yes, this is where the resolution focus should be.
Use an automated CLS optimization tool like Navigation AI to improve your CLS by device memory values
Once you’ve improved CLS, set an alert to be the first to know if it starts worsening again.
Try it yourself
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