43 to 100 mobile PageSpeed: a case-study template
This is the structure we use to publish every result, shown here with sample data. A local trades business was losing enquiries to a slow, builder-heavy WordPress site. We optimised it on a copy, tested with lab and field data, and took it from 43 to 100 on mobile, with no design changes. Sample case until a named client is published.
Mobile PageSpeed, before and after.
At a glance
Which numbers moved?
Every case opens with the headline metrics, measured on mobile, before and after. These are the figures your customers actually feel, and they're the ones we lead with.
Sample figures shown. Real client screenshots are added once permissions are signed off.
The brief
What was the problem?
The site looked fine but loaded slowly on a phone, especially for visitors away from the CBD. A heavy page builder shipped unused code, the hero image was several megabytes, nothing was cached and the host responded slowly. On mobile it scored 43, failed every Core Web Vital, and enquiries were dropping. The owner didn't want a redesign, they wanted the same site, fast. That's exactly what we delivered.
The work
What did we do, in order?
- Converted images to WebP and served scaled sizes. LCP 4.8s → 1.2s.
- Enabled page and object caching. TTFB 0.8s → 0.3s.
- Inlined critical CSS, deferred the rest. First paint render-block removed.
- Trimmed and deferred unused JavaScript. INP 410ms → 140ms.
- Set explicit image and embed dimensions. CLS 0.34 → 0.02.
Results
Which fix moved which number?
This is the information gain rivals skip: it's not just the headline, but exactly which change shifted each metric. If a fix didn't move a number, we wouldn't list it here.
| Fix applied | What it moved |
|---|---|
| Converted images to WebP and served scaled sizes | LCP 4.8s → 1.2s |
| Enabled page and object caching | TTFB 0.8s → 0.3s |
| Inlined critical CSS, deferred the rest | First paint render-block removed |
| Trimmed and deferred unused JavaScript | INP 410ms → 140ms |
| Set explicit image and embed dimensions | CLS 0.34 → 0.02 |
Services used
How would we do the same for you?
Get the same result
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