Tim Kadlec avatar Tim Kadlec

Save-Data Usage

Screenshot of “Save-Data Usage”

Because while the web keeps getting heavier and we keep moving further away from page weight as a primary performance metric, the data I’ve seen so far indicates folks who want low-data experiences are far more common than we may think.


  1. I have a client site with a header that is hidden when the user scrolls down, but shown again when the user scrolls up, which seems pretty comon nowadays.

    This triggers some CLS, even if the hide/show is done in less than 500 ms, as “continuous interactions such as scrolls, drags, or pinch and zoom gestures are not considered ‘recent input’”. 😞

  2. screenshot of Priority Hints and optimizing LCP

    Kevin Farrugia

    Priority Hints and optimizing LCP

    Increasing the priority of a resource usually comes at the cost of another resource, so Priority Hints should be used sparingly. However, if the browser is queuing your LCP image, I recommend you experiment with Priority Hints to see if you can reduce this waiting time and improve your LCP.

  3. Same page tested on PageSpeed Insights over a few hours the same day, without anything modified, and the desktop scores vary from 19 to 59… 🤷‍♂️

    A lot of businesses rely on this crap to now if their site is "fast" enough for Google SEO! 😭

    Three different scores: 44, 59, 19