CVW fails only on Desktop

Andree Sabas

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Oct 2, 2024, 2:06:35 PMOct 2

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Hi everyone,

I am concerned about the Core Web Vitals graph for Desktop on the website drvitenas.com. For some reason, the Desktop metrics are not improving, even though the score is above 95, LCP is below 0.8s, and CLS is under 0.2 according to PageSpeed tests.

Captura de pantalla 2024-10-02 135651.png

What else needs to be done to achieve a "Good" rating for Core Web Vitals? I appreciate your help and look forward to your prompt response.

Regards

Barry Pollard

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Oct 2, 2024, 2:39:50 PMOct 2

to Andree Sabas, web-vitals-feedback

It looks to me from your Real World Use Data that only LCP is failing, and only on Desktop:

This looks to be primarily due to a slow TTFB which at 2.4 seconds means making LCP after that under 2.5 seconds is pretty much impossible.

This suggests one of two things:

Your server is slow for some of your users but not for you. Which could be for a number of reasons:

Your testing is hitting cached results and so is nice and fast on repeat visits (like running PageSpeed Insights multiple times).
Your users are further away from you. I see you are using the Cloudflare CDN so that shouldn't matter as much as they have good global connectivity, but you also are not utilising caching off the HTML so you may wish to configure that to improve that.

Your pages are served after a number of redirects (e.g. if many users are coming from ads that follow multiple redirects). This latter one is more difficult to solve but the best I can suggest is that you avoid URL shorteners (e.g. bit.ly links), unless strictly necessary, and also that the final URLs are used (e.g. I notice you said drvitenas.com when actually your site is served at https://www.drvitenas.com. Redirecting to add the www and then again to connect to HTTPS can add two steps when you could make sure your links go straight to where you want people to go. Similarly be careful with trailing slashes which some sites redirect to add or remove if they are used/not used.

Thanks,

Barry

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Google Workspace

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Oct 4, 2024, 7:13:44 AMOct 4

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Hi Barry,

Thank you for your response. If there are any redirects, wouldn't they affect the CWV of the mobile version?

Barry Pollard

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Oct 4, 2024, 7:15:48 AMOct 4

to Google Workspace, web-vitals-feedback

Yes in theory TTFB should be similar for both mobile and desktop. The fact it is not means it's worth looking at the traffic differences between though two if you have analytics set up (e.g. Google Analytics or similar).

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