Case study template

A before-and-after speed case study you can publish on your own site.

Use this page to document real improvements from moving site images onto CDN delivery: cleaner evidence, better credibility, and a stronger conversion story.

By Gregory J. Cook • 124 South Main CDN

Conversion page

This page is written as a practical before-and-after case study that can persuade visitors who are already thinking about site speed.

Evidence over hype

Show screenshots, metrics, and exact implementation changes. Specifics build trust much faster than generic claims.

Perfect for your own properties

You can adapt this page for gregcook.net, guncollectorsclub.com, or any page where moving images off the origin improved results.

Case study structure

Strong case studies answer five questions fast: what was slow, what changed, what improved, how it was measured, and why the change mattered to the business or user experience.

Recommended narrative

  1. Baseline: describe the original page and where images were served from.
  2. Problem: note the symptoms such as slower image delivery, heavier origin load, or uneven performance by region.
  3. Implementation: explain the exact move to CDN URLs, next-gen formats, long cache lifetimes, and responsive sizes.
  4. Results: show metric changes and page screenshots.
  5. Takeaway: explain which types of sites can expect similar wins.

Example results table

MetricBeforeAfterWhy it matters
Image TTFBHigher and more variableLower and more consistentVisitors see visual content begin sooner.
Origin image trafficAll requests hit originMost requests served from cacheFrees your main server for HTML and app work.
Largest Contentful PaintSlower hero image arrivalFaster hero image displayImproves user perception and Core Web Vitals.
Repeat visit speedInconsistentMore instant feelingCache reuse helps page-to-page browsing.

What to include from your real tests

  • PageSpeed or Lighthouse screenshots.
  • Before-and-after waterfalls from WebPageTest or DevTools.
  • The exact headers or markup changes you made.
  • One or two lessons learned, such as not lazy-loading the hero image.

Example implementation summary

1. Converted large photos to WebP.
2. Created 640, 960, and 1280 pixel variants.
3. Updated image URLs to the CDN domain.
4. Set long-lived cache-control for versioned assets.
5. Added width and height attributes in markup.
6. Kept the hero image eager and moved gallery images to lazy loading.

Recommended closing section

If your site depends on photography, article thumbnails, product images, or branded visuals, image delivery is often the fastest route to meaningful speed gains. A well-structured case study lets you prove that with your own numbers.

Turn your own site into proof.
Publish a real before-and-after and link it from your About page, Guides hub, and comparison articles.

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