Lazy Loading, CDN, and More: Tools We Use to Supercharge Performance

30.06.2025

In today’s fast-paced digital world, users expect websites to be blazing fast, responsive, and efficient across all devices. At Markup Solution, we make performance a top priority in every project we build. A slow site doesn’t just frustrate users—it costs you SEO rankings, conversions, and revenue.

In this blog, we’ll cover the essential tools and strategies we use to optimise performance. From lazy loading to CDNs, caching, and more—these techniques work together to deliver fast, scalable websites that users (and search engines) love.

Why Website Performance Matters

Here’s what happens when your site is slow:

• Higher bounce rates: Users abandon pages that take more than 3 seconds to load.
• Lower search rankings: Google includes speed as a key ranking factor.
• Reduced conversions: Every extra second of delay can decrease conversions by 7%.

If your site is slow, you're losing traffic and money. Fortunately, there’s a lot you can do to fix that.

1. Lazy Loading: Load What Matters, When It Matters

Lazy loading defers the loading of images, videos, or other content until they're needed—specifically, when they appear in the user's viewport. This reduces initial page load time and saves bandwidth.

How We Do It:

• Use the native loading="lazy" attribute for images:
• <img src="example.jpg" loading="lazy" alt="Example Image" />
• For more advanced cases, we use JavaScript with the Intersection Observer API or libraries like react-lazyload.

Benefits:

• Faster load times on page start
• Reduced initial bandwidth
• Better mobile performance

2. Content Delivery Network (CDN): Delivering Content Globally

A CDN (Content Delivery Network) stores copies of your website’s static assets (images, JavaScript, CSS, etc.) on servers around the world. This allows users to load those assets from a nearby server, reducing latency.

CDNs We Use:

• Cloudflare: Combines performance with DDoS protection
• AWS CloudFront: Great for enterprise-grade apps
• Vercel/Netlify Edge: Ideal for static sites and modern frameworks

Benefits:

• Global performance consistency
• Faster asset delivery
• Scalable bandwidth usage

3. Image Optimization: Cut the Weight

Images are often the heaviest part of a webpage. Uncompressed or oversized images can ruin load times.

Optimization Techniques:

• Use modern formats like WebP or AVIF
• Resize and compress with tools like ImageMagick, Squoosh, or TinyPNG
• Use responsive image tags with srcset and sizes
• Implement Next.js Image Component for built-in optimization

import Image from 'next/image';

<Image
  src="/banner.jpg"
  alt="Hero Banner"
  width={1200}
  height={600}
  quality={80}
  loading="lazy"
/>

  

Benefits:

• Up to 80% smaller file sizes
• Improved Largest Contentful Paint (LCP)
• Faster initial and mobile load

4. Code Splitting: Only Load What’s Needed

Code splitting breaks your JavaScript bundle into smaller parts, loading them only when necessary. This significantly reduces the time it takes for your site to become interactive.

How We Split Code:

• Use dynamic imports with React.lazy() or Next.js route-based code splitting
• Extract third-party libraries into separate bundles
• Load components conditionally

const Modal = React.lazy(() => import('./Modal'));
  

Benefits:

• Lower initial JavaScript payload
• Faster interaction for users
• Better performance on slow devices

5. Minification & Compression

Why send unused code or spaces to the user? We minify and compress all production assets.

Tools We Use:

• Terser and UglifyJS for JavaScript minification
• cssnano and PurgeCSS for CSS cleanup
• Gzip and Brotli compression on servers and CDNs

Benefits:

• Up to 70% reduction in file size
• Faster network transfer
• Higher PageSpeed scores

6. Smart Caching Strategies

Caching is key to improving repeat visits and reducing server load.

Our Approach:

• Cache-Control headers for static assets
• Use service workers for PWA support
• CDN-level caching for APIs and assets

Cache-Control: public, max-age=31536000, immutable

Benefits:

• Instant load on return visits
• Better experience in low-connectivity areas
• Lower server costs

7. Performance Monitoring Tools

We continuously monitor site performance using best-in-class tools to detect and fix slowdowns.

Tools We Rely On:

• Google Lighthouse
• PageSpeed Insights
• WebPageTest
• Core Web Vitals (Chrome DevTools)
• Real User Monitoring (RUM) with New Relic or Datadog

Benefits:

• Visibility into real-world performance
• Easy Core Web Vitals tracking
• Data-driven optimisation

Final Thoughts

Performance isn't just a developer concern—it’s a core business priority. When your site loads faster, it performs better across the board: SEO, UX, engagement, and revenue.

At Markup Solution, we don't treat performance as an afterthought. It’s baked into every project, using tools like:

• Lazy Loading
• CDN Delivery
• Image Optimisation
• Code Splitting
• Smart Caching
• Minification & Monitoring