06 — Store
<3 sec
Target Load Time
On 4G mobile connection
7%
CVR Loss/sec
Every second over 3 seconds
<200KB
Image Target
Per image after compression
50+
Lighthouse Score
Google PageSpeed target
7%
conversion rate lost per second of extra load time
A 4-second load vs 2-second load = 14% fewer sales
| Speed Killer | Impact | Fix | Priority |
|---|---|---|---|
| Large Uncompressed Images | +2-4 sec load time | Compress to <200KB, use WebP format | Critical |
| Too Many Apps | +1-3 sec from app scripts | Limit to 7 apps, audit each one | Critical |
| Render-Blocking JS | +1-2 sec before first paint | Defer non-critical JS, async load | High |
| No CDN | +0.5-1.5 sec for distant users | Enable Shopify CDN (automatic) | High |
| Custom Fonts | +0.5-1 sec font loading | Use system fonts or preload web fonts | Medium |
| Unoptimized Theme | +1-3 sec from bloated code | Use Dawn or fast theme, remove unused code | High |