WebP images not recognized by Google PageSpeed Insights

  • Resolved dorf

    (@dorf)


    8 years, 3 months ago

    Recently PageSpeed Insights flagged many images on my site as not being optimized. This had not been the case prior to Bluehost doing a server update on Friday, and then me updating the php from 5.6 to 7. (could be a coincidence)

    I am using the plugin’s recommended WebP .htaccess mod_rewrite and mod_headers rules. I can see in Chrome’s Web Inspector Network tab that the images are of type WebP, however, Google PageSpeed insights is instructing me to optimize jpg images

    Here is the site
    https://scubaguru.org/

    • This topic was modified 8 years, 3 months ago by dorf.
Viewing 2 replies - 1 through 2 (of 2 total)
  • Plugin Author nosilver4u

    (@nosilver4u)

    Yeah, you definitely need to make sure that JPG images are still being optimized properly, even when you are using WebP, since WebP images are only served to supported browsers. I don’t know the latest numbers for browser market share, but I would suspect around half of your visitors are going to be getting the JPG version of your images. Most notably, Internet Explorer (and Edge) and Firefox still do not support WebP. Firefox is making progress on it, but to my knowledge it hasn’t landed in the stable builds yet.

    So make sure you’ve got EWWW set to remove metadata, and that you have JPG compression set to at least lossless compression. If you’re still having problems, and you know EWWW has optimized those images, please post links to a couple of the images, and then turn on EWWW’s debug setting, and post the debug information from the settings page via pastebin.com

    Plugin Author nosilver4u

    (@nosilver4u)

    After seeing another similar post, and speaking with an API customer at length, I think Google just switched the image compression method in their Pagespeed tests from lossless to lossy. The only way to get lossy compression, without manually downloading all your images, is to use the API. I haven’t been able to confirm this anywhere online, but after three reports (and a test on one of my own sites), that is my suspicion.

Viewing 2 replies - 1 through 2 (of 2 total)
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