Does Pagespeed Insights get it wrong?

  • Resolved van24

    (@van24)


    9 years, 8 months ago

    Hi Frank. Awesome plugin. I got the Critical CSS power-up too.

    It’s working like a charm except for one page. I’m still getting the ‘Eliminate render-blocking JavaScript and CSS in above-the-fold content’ in Pagespeed Insights. The two CSS files it’s warning me about are Autoptimize-generated files.

    This warning is just appearing for Mobile, which seems strange. The Pagespeed Insights score for Desktop is 100 so it’s clearly not a problem there.

    I checked on Pingdom and it looks like those 2 Autoptimized CSS files are actually being delivered after about 0.4 seconds, and are not render-blocking at all.

    So everything looks great, but Pagespeed Insights says it’s not OK. Does Pagespeed Insights ever get it wrong?

    • This topic was modified 9 years, 8 months ago by van24.
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  • Plugin Author Frank Goossens

    (@futtta)

    9 years, 8 months ago

    the short answer: yes, GPSI does get it wrong sometimes 🙂

    but you don’t have to guess, you can check;
    * go to that page in your browser
    * in your browser’s developer tools select the option to test responsiveness and there select a smaller screen
    * in your browser’s developer tools select the CSS/ style editor and disable the 2 autoptimize-files (in firefox there’s an eye or so next to each CSS, clicking that toggles the CSS being active)

    if at that point the look&feel of the page changes more then a tiny bit, then GPSI is right (because the deferred CSS is needed to render your page correctly) and you might have to amend the critical CSS a bit.

    frank

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