PLS by data save mode

PLS by data save mode breaks down your Perceived Load Speed (PLS) based on whether the user’s browser or device has activated a data-saving mode. This setting is often used on limited mobile networks or by users trying to conserve bandwidth.

PLS, which reflects how fast the page feels to load from the user’s perspective, is especially important for those on constrained connections — as slow perceived loading can push them to bounce quickly.

If your site shows a significant difference in perceived speed between users with data-saving mode enabled and those without, it may indicate that your page isn’t adapting well to lower-bandwidth scenarios.

A healthy distribution should show only minor degradation — users with data save mode should still feel the site loads reasonably fast. If they don’t, your experience may feel bloated or heavy to a performance-sensitive audience.

When PLS is noticeably slower for users with data-saving mode turned on, it typically points to large unoptimized media, render-blocking scripts, or a lack of adaptive loading strategies. These users are often on slow or unstable networks — meaning any perceived delay can drive instant drop-off.

This is especially concerning if your audience includes many mobile users, visitors from developing regions, or bandwidth-conscious segments.

Go-to action plan to resolve an unhealthy PLS by data save mode:

Discover how your website performs with real user data.
​