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Mobile Speed Issues



Is anyone else seeing really bad mobile speed tests on their Squarespace sites? Every one I test has good desktop speed tests (80+/100) using PageSpeed insights but really bad on a mobile (under 40/100), some under 30...

Does anyone have any tips how to improve mobile speed?

Main issues seem to be the following:

  • Eliminate render-blocking resources
  • Remove unused JavaScript
  • Serve images in next-gen formats
  • Remove unused CSS
  • Ensure text remains visible during webfont load
  • Reduce the impact of third-party code (all seems to be Squarespace and Adobe Typekit
  • Minimize main-thread work 
  • Serve static assets with an efficient cache policy (seems to be to do with Squarespace CDN)
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Hi there.

I think the only ways you can fix these things are to move any code firing via code injection in the head of the page to the footer - this will stop render blocking. Anything else you want to remove in the header can only be done by going down the developer route.

Next Gen formats again I think would be based on you being able to add them via the wysiwig, which I don't think it supports.

Unused CSS is again tied outside of your control, although you may be able to expedite some load times with a pre-load (you might need to change the last item).

<link rel="preload" href="//fonts.gstatic.com">
<link rel="preload" href="//connect.facebook.net">
<link rel="preload" href="//googletagmanager.com">
<link rel="preload" href="//ajax.googleapis.com">
<link rel='preconnect' href='https://fonts.gstatic.com' crossorigin>
<link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Poppins:700,300,500&display=swap'>

Again on the other points, outside of your control.

Bear in mind that GT METRIX users Google Lighthouse for performance scores, and unless  you are serving a blank page no-one gets over 65%! 🙂

Always remember that Google simply wants your websites to load fast so they can serve ads over them quickly, it has nothing to do with user experience 🙂 All that slows my website down now is their code.




We provide digital marketing services for businesses that need exposure/sales from search and social media networks. We also build incredibly fast and well optimised multi-language Square Space websites.
Digital Marketing | Marketing Digitale

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