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unstable cdn?

When i input my site http://www.swXX.hk in https://search.example.com/test/mobile-friendly,

sometimes it is ok, sometimes it returns more than 86 errors.

Fri, 26 Apr 2019 8:36:20
  • Adam
    • Support Gorilla

    Hello kamhangmak

    I hope you’re well today and thank you for your question!

    I tested your site multiple times with that tool and I can see the issue but I think it’s something different. I believe by “unstable CDN” you mean Smush CDN as this is enabled on your site and resources reported in the first place are coming from there.

    However, if you look closer at the list of resources/files reported, you’ll noticed that there are also other resources listed – like CSS and JS files that are not related to Smush and Smush CDN in any way. Sometimes there are no images reported at all, just some CSS files.

    The inconsistency is big but even more interesting thing is that when the CDN images are reported, some of them are not even referenced in site’s source CODE in mobile view at all.

    Unfortunately, I don’t have much insight into how this Google tool “technically” is fetching, parsing and analyzing the site but I think that’d be more related to either the theme itself or even a server. At some moment, I was under impression that the site is using some sort of “pre-loader” and that could actually explain such behavior. I do see though that in Theme Options there is a “pre-loader” feature but it’s disabled.

    It would be good to check if the test behaves the same way (sometimes it’s fine, sometimes it reports more or less resources) e.g. with Twenty Ninteen theme (as it doesn’t use any pre-loader code). Also, are there any server-side caches and if so could they be temporarily (just for testing) cleared up and disabled? If yes, it’s also worth checking how the test behaves.

    Best regards,

    Adam