How to improve score performance in mobile and enhance your CoreWebVitals

Improve score performance in mobile and enhance your CoreWebVitals score, make sure the site is optimized for speed, responsiveness, and loading.

Here's a basic strategy that includes code snippets and techniques to boost performance:

1. Defer Parsing of JavaScript

Defer the loading of JavaScript files to prevent render-blocking during the initial load:

<script src="your-script.js" defer></script>

If you're using external scripts, load them asynchronously:

<script async src="your-script.js"></script>

2. Lazy Load Images 

Lazy load images to ensure they only load when they are visible in the viewport. This reduces the initial page load time significantly:

<img src="your-image.jpg" loading="lazy" alt="description">  

3. Minify CSS, JavaScript, and HTML

Minify your CSS, JavaScript, and HTML to remove unnecessary spaces and comments. You can use online tools like Minifier or include the following:

For CSS:

<link rel="stylesheet" href="your-style.css" media="all">  

 

Also, include critical CSS inline to avoid render-blocking:

<style> /* Your critical CSS */ </style>  

For JavaScript: You can combine and minify your JavaScript files into a single file. 

4. Use a CDN for Static Assets 

Use a Content Delivery Network (CDN) for images, JavaScript, CSS files, and other static assets. This can reduce the load time by serving assets from servers closer to the user. Example using Cloudflare:

<link rel="stylesheet" href="https://cdn.cloudflare.com/your-style.min.css">  

5. Optimize Fonts 

Fonts can be a major source of performance issues. Use font-display: swap; to avoid invisible text during font loading:

<style> @font-face { font-family: 'CustomFont'; src: url('customfont.woff2') format('woff2'); font-display: swap; } </style>  

6. Reduce Image Sizes 

Ensure all images are compressed and in next-gen formats like WebP. You can use tools like TinyPNG or an online converter:

<img src="image.webp" alt="description">  

7. Remove Unnecessary Widgets

Blogspot themes often include unnecessary widgets or scripts. Go through your theme and remove any unnecessary ones:

 <!-- Remove unnecessary scripts and widgets -->

8. Enable Browser Caching 

Ensure that your server headers are set to cache static files, such as CSS, JavaScript, and images, to reduce load times on return visits:

<IfModule mod_expires.c> ExpiresActive On ExpiresByType image/jpg "access plus 1 year" ExpiresByType image/jpeg "access plus 1 year" ExpiresByType image/gif "access plus 1 year" ExpiresByType image/png "access plus 1 year" ExpiresByType text/css "access plus 1 month" ExpiresByType text/html "access plus 1 day" ExpiresByType application/javascript "access plus 1 year" </IfModule>  

9. Use AMP (Accelerated Mobile Pages) 

AMP can significantly improve mobile loading speeds. You can enable AMP on Blogspot by using AMP-compliant templates:

<link rel="amphtml" href="https://yoursite.blogspot.com/amp">

10. Remove Render-Blocking CSS 

Use this snippet to ensure that only critical CSS is loaded first, while the rest can be deferred:

<link rel="preload" href="style.css" as="style">

You can also load the stylesheet asynchronously:

<link href="style.css" rel="stylesheet" media="print" onload="this.media='all'">  

11. Preconnect and Prefetch Resources 

You can preconnect to important third-party services (like fonts or CDNs) to reduce latency:

<link rel="preconnect" href="https://fonts.googleapis.com"> <link rel="dns-prefetch" href="//example.com">

12. Use Responsive Images 

Specify different image sizes based on the screen width to avoid loading large images on mobile device:

<img srcset="image-small.jpg 480w, image-medium.jpg 800w, image-large.jpg 1200w" sizes="(max-width: 600px) 480px, (max-width: 900px) 800px, 1200px" alt="description">

Final Considerations 

Audit the Site: Run Google’s PageSpeed Insights to check your Core Web Vitals and follow its specific recommendations. Reduce the DOM Size: Too many elements in the DOM can cause performance issues, especially on mobile.

Implementing these strategies will help improve your Blogspot site's performance and Core Web Vitals on mobile devices.