My Shopify website hiboost.com is built using Impack theme, but it is very slow, I test it on Google PageSpeed Insights, the Performance is only 47 for the Mobile version, how to boost my website PageSpeed Insights scores?
Hello @sosososonow I strongly recommend having a look at the replies in this older Shopify thread here if you haven’t already How can I boost my Google Pagespeed Insights scores?
Hi @sosososonow
Optimizing your speed can be a very complicated and lengthy process.
Here at SearchPie: SEO, Speed & Schema we do have some ways that you can try to improve your site speed by compressing your image sizes without affecting their quality or enabling our Instant Page feature.
Give it a try and see if it suits you!
Cheers
Hi @sosososonow ,
Improve TBT Performance
- 1.Load third-party scripts after page load.
- For scripts that are not essential for the initial render (analytics, chat widgets, marketing tags), add
deferorasyncattributes. - Lazy-load chat widgets
Largest Contentful Paint (LCP)
- LCP is delayed because hero images, banners, or large product images load late.
- Preload LCP image
- Add fetch-priority=“high” on the lcp img tag
- reomve lazy load from lcp img tag
First Contentful Paint (FCP)
- Inline critical CSS for above-the-fold elements (header, nav, hero section).
- Defer or async non-critical CSS/JS files. Example:
<link rel="stylesheet" href="theme.css" media="print" onload="this.media='all'">
- Preload key web fonts and use
font-display: swap. Example:
<link rel="preload" as="font" type="font/woff2" href="{{ 'your-font.woff2' | asset_url }}" crossorigin>
Hi @sosososonow
I checked the performance for your site https://pagespeed.web.dev/analysis/https-hiboost-com/jakk70t7lv?form_factor=mobile
and here’s what stands out: your desktop speed is actually strong (scoring in the 90s), but on mobile the performance drops quite a bit — things like First Contentful Paint and Largest Contentful Paint are taking much longer than they should. That’s usually why mobile visitors feel the site is slow and it can lead to higher bounce rates.
Here’s what’s going on and how you can fix it:
1. Image optimization for mobile
Right now, your images (like banners and product photos) are being loaded in the same large size across all devices. On desktop that’s fine, but on mobile it slows things down because the phone has to load heavy images it doesn’t really need.
The fix: upload optimized versions of your images for mobile in lighter formats like WebP, and make sure you’re using responsive image settings. That way, visitors on mobile will only load the smaller, faster versions.
You can add this code to your theme’s liquid file (for example, inside a section or snippet where you’re showing images):
2. Smarter script handling
Your theme and apps add extra scripts (for things like tracking, popups, or design effects). The issue is many of them are set to load right away, even before your visitor sees the page. This delays the important parts of your site from appearing.
The fix: defer or lazy load non-essential scripts so they load in the background after your main content is visible. That way, the page feels faster without losing any features.
3. Focus on above-the-fold content
“Above the fold” means the part of your site people see immediately without scrolling. At the moment, this section is competing with content further down the page, so everything is trying to load at once. This creates delays in showing users the top section quickly.
The fix: prioritize the loading of your header, hero banner, and navigation first. Push the rest (like footer elements or lower sections) to load afterward. That way, users get an instant view and don’t feel like they’re waiting.
When mobile visitors see a page load quickly at the top, they’re far less likely to bounce. Even small changes here can make a big difference in engagement and conversions.
To speed up your store even further, you might want to try the Website Speedy app for Shopify. It’s designed to automatically take care of the key things that usually slow down stores — like compressing images, deferring non-essential scripts, and enabling lazy loading.
The setup takes just a few minutes, and there’s a free tril so you can actually see the improvements on your store before committing. You can check it out here: Website Speedy on Shopify.
Hi @sosososonow
I have tested your website speed again and here is the latest score result attached:
The speed on mobile is 27 only and on desktop, it shows 57. Both of them are under very low score status.
I can share you the way how to check the issue cause codes and find out the solution, you can click Expand view option in Metric section and click results in Diagnostics to see the optimization suggestions directly. Concerning this aspect, one feature in SEOAnt called Site Speed Up meets your demand, as it contains Instant Page, Lazy Load Images, Streamline Code and Optimized Loading, etc. Most detected issues existing on your store are included in Site Speed Up feature and you can make the comparison properly to consider optimizing with it, since it refers to technical SEO section. Thank you!
