Litespeed loading 91,6% Unused Bytes

  • Resolved emanuele2783

    (@emanuele2783)


    4 months, 1 week ago

    Hello, the home page of my website fails the Core Web Vitals assessment on PageSpeed Insights so I started to investigate the issue. When I open the web devoloper tools from Google Chrome from the tabs Sources>Coverage I can see that the LiteSpeed Cache plugin is the first on the list and loads 91,6% of unused Bytes.

    In the “CSS Settings” tab of the Litespeed Cache plugin “page optimization” settings all options are enabled (ON) apart from “Generate UCSS ” (because it gives a problem with the design of the page).

    The Report Number sent is: QZWHGXWT

    Could someone explain me why LiteSpeed is loading all these unused Bytes and how I can reduce or eliminate them?

    Thank you very much

    The page I need help with: [log in to see the link]

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  • Plugin Support litetim

    (@litetim)

    4 months, 1 week ago



    @emanuele2783 Unused CSS comes from all the CSS that is loaded and not used on a page(link). To resolve this there is the option to use UCSS and wait for it to finish generating CSS for that page.
    QC connection is needed for this feature to work.
    Give it a try. More details can be found here: https://docs.litespeedtech.com/lscache/lscwp/pageopt/#generate-ucss. To see if it’s loaded and finish generating you need to look into page source and see a message: UCSS loaded from …. right at the end.

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