How to Speed Up Your Website: Complete Performance Guide

Why Website Speed Matters

Here are three numbers that should get your attention:

• 53% of mobile users abandon sites that take more than 3 seconds to load
• A 1-second delay in page load reduces conversions by 7%
• Google uses page speed as a ranking factor for both mobile and desktop search

Speed isn't just a nice-to-have — it directly affects your traffic, revenue, and search rankings. The good news: most speed improvements are straightforward once you know where to look.

Start With a Baseline: Test Your Speed

Before optimizing anything, measure where you stand. Use our free Speed Test tool to get a comprehensive analysis of your site's performance, including:

• Response time and TTFB
• Core Web Vitals (LCP, CLS, FID/INP)
• Page size and request count
• SSL certificate status
• Security headers

This gives you a baseline to measure improvements against.

Step 1: Choose the Right Hosting

Your hosting provider sets the performance ceiling for your entire site. No amount of front-end optimization can compensate for a slow server.

What to look for in a fast host

• Time to First Byte (TTFB) under 200ms — this is the server's response time before any content loads
• SSD/NVMe storage — 10-100x faster than traditional hard drives for database queries
• Modern web servers — LiteSpeed or NGINX outperform Apache for most workloads
• Server location near your audience — physics matters, and data travels at the speed of light

Our fastest-tested hosts

If your current host delivers TTFB above 400ms, switching providers will make a bigger difference than any other optimization on this list. See our best web hosting guide for detailed comparisons.

Step 2: Implement Caching

Caching stores pre-built versions of your pages so the server doesn't have to rebuild them for every visitor. This alone can reduce load times by 50-80%.

Browser caching

Set appropriate Cache-Control headers so browsers store static assets locally:

# Recommended cache durations
Images, fonts:     Cache-Control: public, max-age=31536000 (1 year)
CSS, JS:           Cache-Control: public, max-age=604800 (1 week)
HTML:              Cache-Control: public, max-age=3600 (1 hour)

Server-side caching

• Page caching — stores the full HTML output. Critical for CMS-based sites.
• Object caching — stores database query results in memory (Redis or Memcached). Reduces database load by 70-90%.
• Opcode caching — stores compiled PHP code. OPcache is built into PHP 8+ and should always be enabled.

WordPress caching plugins

If you're on WordPress, use a caching plugin that matches your server:

• LiteSpeed + LSCache — best on Hostinger, A2 Hosting
• SiteGround Optimizer — best on SiteGround (uses their SuperCacher)
• WP Super Cache or W3 Total Cache — works anywhere
• Redis Object Cache — for database-heavy sites

Step 3: Optimize Images

Images typically account for 50-70% of a page's total weight. Optimizing them is the single highest-impact front-end change.

Use modern formats

• WebP — 25-35% smaller than JPEG at equivalent quality. Supported by all modern browsers.
• AVIF — 50% smaller than JPEG. Supported by Chrome, Firefox, and Safari 16+.

Implement responsive images

Serve appropriately sized images for each device:

<img
  srcset="image-400.webp 400w, image-800.webp 800w, image-1200.webp 1200w"
  sizes="(max-width: 600px) 400px, (max-width: 1000px) 800px, 1200px"
  src="image-800.webp"
  alt="Description"
  width="800"
  height="600"
  loading="lazy"
/>

Lazy load below-the-fold images

Add loading="lazy" to images that aren't visible on initial page load. This reduces the initial page weight and speeds up Largest Contentful Paint.

Compression tools

• Squoosh (squoosh.app) — free browser-based tool
• Sharp — Node.js library for build-time optimization
• Cloudflare Polish — automatic image optimization via CDN

Step 4: Use a CDN

A Content Delivery Network caches your static assets on servers worldwide, reducing the physical distance between your content and your visitors.

Impact of CDN on load times

Without CDN, a user in Tokyo loading a site hosted in New York experiences ~200ms of latency just from network distance. With a CDN, that same content loads from a Tokyo edge server in ~20ms.

Recommended CDNs

• Cloudflare — free tier includes CDN, DDoS protection, and basic optimizations. The best starting point.
• Bunny CDN — $0.01/GB, fastest pure CDN. Great value for media-heavy sites.
• Cloudflare Enterprise (via Cloudways) — premium features included with hosting.

Step 5: Minimize and Compress Code

Minify CSS and JavaScript

Remove whitespace, comments, and unnecessary characters from your code:

• CSS: 20-40% size reduction
• JavaScript: 30-50% size reduction

Build tools like Webpack, Vite, or esbuild handle this automatically in production builds.

Enable text compression

Enable Gzip or Brotli compression on your server. Brotli typically achieves 15-25% better compression than Gzip for text-based files.

Most modern hosts enable compression by default. Test with our Speed Test tool — it checks for compression in the security headers analysis.

Remove unused code

Audit your CSS and JavaScript for unused code. Tools like PurgeCSS can remove unused CSS selectors, often reducing CSS file size by 80-95%.

Step 6: Optimize Core Web Vitals

Google's Core Web Vitals are the three metrics that matter most for SEO and user experience:

Largest Contentful Paint (LCP) — Target: Under 2.5s

LCP measures when the largest visible content element finishes loading. To improve it:

• Optimize your server response time (Steps 1-2)
• Preload the LCP image: <link rel="preload" as="image" href="hero.webp">
• Avoid lazy-loading the hero image (it's above the fold)
• Use appropriate image sizes (Step 3)

Cumulative Layout Shift (CLS) — Target: Under 0.1

CLS measures visual stability — how much the page content shifts while loading. To fix it:

• Always include width and height attributes on images and videos
• Reserve space for ads and embeds with CSS aspect-ratio or fixed dimensions
• Avoid inserting content above existing content (especially headers and banners)
• Use font-display: swap with web fonts and preload critical fonts

Interaction to Next Paint (INP) — Target: Under 200ms

INP measures responsiveness to user interactions. To improve it:

• Break up long JavaScript tasks (>50ms) into smaller chunks
• Use requestIdleCallback for non-critical work
• Minimize main-thread JavaScript execution
• Consider moving heavy computations to Web Workers

Step 7: Optimize Loading Strategy

Preload critical resources

<link rel="preload" href="/fonts/inter.woff2" as="font" type="font/woff2" crossorigin>
<link rel="preload" href="/hero-image.webp" as="image">

Defer non-critical JavaScript

<script src="analytics.js" defer></script>
<script src="chat-widget.js" async></script>

Use defer for scripts that need DOM access but aren't critical for initial render. Use async for completely independent scripts.

Preconnect to third-party origins

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

This establishes connections early, saving 100-300ms per third-party resource.

Speed Optimization Checklist

Use this checklist to systematically improve your site:

• Test baseline speed with DigiHosts Speed Test
• Server TTFB under 200ms (upgrade hosting if needed)
• Browser caching configured for static assets
• Server-side page caching enabled
• Object caching (Redis/Memcached) for database-heavy sites
• Images converted to WebP/AVIF
• Responsive images with srcset
• Lazy loading for below-the-fold images
• CDN active (at minimum, Cloudflare free tier)
• CSS and JS minified
• Gzip or Brotli compression enabled
• Unused CSS/JS removed
• LCP element preloaded
• Image/video dimensions specified (for CLS)
• Critical fonts preloaded
• Non-critical JS deferred
• Third-party origins preconnected

How to Monitor Speed Over Time

Optimization isn't a one-time event. New content, plugins, and code changes can degrade performance. Set up ongoing monitoring:

1. Regular speed tests — run our Speed Test monthly
2. Uptime monitoring — track response times continuously with DigiHosts Monitor
3. Google Search Console — monitor Core Web Vitals in the Experience report
4. Real User Monitoring (RUM) — tools like web-vitals.js track actual user experiences

FAQ

How fast should my website load?

Aim for under 2.5 seconds for Largest Contentful Paint (LCP) and under 200ms for Time to First Byte (TTFB). Google considers pages "good" when LCP is under 2.5s, CLS is under 0.1, and INP is under 200ms.

Does hosting affect website speed?

Hosting is the single biggest factor in server-side performance. A fast host (TTFB under 200ms) gives you a head start that no amount of front-end optimization can replicate on a slow host. See our hosting speed comparison for benchmarked providers.

How do I check my website speed?

Use our free Speed Test tool for a comprehensive analysis including response time, Core Web Vitals, page size, SSL status, and security headers. Google's PageSpeed Insights and WebPageTest.org are also excellent tools.

Does a CDN really make a difference?

Yes, especially for visitors far from your server. A CDN can reduce load times by 40-60% for geographically distant users by serving content from nearby edge servers. Cloudflare's free tier is the easiest way to add a CDN.

How do I speed up WordPress specifically?

Start with hosting (LiteSpeed servers from Hostinger or SiteGround's SuperCacher), add a caching plugin (LSCache, SG Optimizer, or WP Super Cache), optimize images (WebP format + lazy loading), and use a CDN. This combination typically delivers 70-80% improvement. For detailed WordPress hosting options, see our WordPress hosting guide.

Will optimizing speed help my SEO?

Yes. Google uses Core Web Vitals as a ranking factor. Pages with good LCP, CLS, and INP scores get a ranking boost over slower competitors. Beyond Google's algorithm, faster pages also have lower bounce rates and higher engagement, which indirectly helps SEO.