L10 Site Speed Docs

title: "Site Speed Optimization for Documentation" weight: 10 description: "Learn site speed optimization for documentation SEO: image optimization, caching, lazy loading, minimizing JavaScript, CDN configuration, and Core Web Vitals improvement strategies." date: 2026-06-28 lastmod: 2026-06-28 tags: [technical-writing, seo] }

Site speed optimization ensures documentation pages load quickly, improving user experience, reducing bounce rates, and meeting search engine Core Web Vitals requirements for better rankings.

In this lesson, you will learn image optimization, caching strategies, lazy loading, JavaScript minimization, CDN configuration, and Core Web Vitals improvement.

What You'll Learn

You will learn how to optimize documentation site speed through image compression, caching, lazy loading, code minimization, CDN usage, and Core Web Vitals optimization.

Why It Matters

Page speed is a ranking factor. Faster pages rank higher and have lower bounce rates. A 1-second delay reduces conversions by 7 percent.

def check_core_web_vitals(lcp, fid, cls):
    """Check Core Web Vitals against Google thresholds."""
    return {
        "LCP": f"{lcp}ms ({'Pass' if lcp < 2500 else 'Needs improvement'})",
        "FID": f"{fid}ms ({'Pass' if fid < 100 else 'Needs improvement'})",
        "CLS": f"{cls} ({'Pass' if cls < 0.1 else 'Needs improvement'})",
    }

Teacher Mindset

Think of site speed as the checkout line at a store. Long lines frustrate customers and make them leave. Fast checkout makes them happy.

Common Mistakes

1. Uncompressed Images

Large images are the primary cause of slow pages. Compress and convert to WebP.

2. No Lazy Loading

Images below the fold should lazy load. Add loading="lazy" to all images.

3. Render-Blocking JavaScript

JavaScript that blocks page rendering delays content display. Defer or async non-critical scripts.

Practice Questions

1. What is LCP (Largest Contentful Paint)? Time until the largest content element is visible. Should be under 2.5 seconds.

2. How does CDN improve site speed? CDNs serve content from servers geographically closer to users, reducing latency.

3. Challenge: Optimize a documentation page to pass Core Web Vitals.

FAQ

Mini Project

Run PageSpeed Insights on 5 documentation pages. Identify common issues. Fix images (compress, convert to WebP). Add lazy loading. Implement caching. Re-test and compare scores.

What's Next

Analytics Search Console in the next lesson.