Back to Case Studies+104%
28% increase in conversion rate
40% reduction in bounce rate
15% increase in average session duration
Image optimization alone can often solve 50% of speed issues
App bloat is the silent killer of Shopify performance
Progressive improvements are more sustainable than complete rewrites
Auto PartsSpeed SprintImage OptimizationTheme Cleanup
Auto Parts Store Speed Optimization
Transformed a sluggish 4,500+ SKU catalog into a blazing fast shopping experience, boosting conversions by 28%.
0PageSpeed
45 → 92
Improvement
+104%
Timeline
14 days
PageSpeed
92
"PageSpeed went from 45 to 92. Bounce rate dropped 40%. The numbers speak for themselves - this wasn't a tweak, it was a transformation."
M
Marcus T.
Store Owner
2The Challenge
This auto parts retailer came to me with a problem all too common in the industry: a massive product catalog (4,500+ SKUs) that was killing their site speed. Their PageSpeed score was sitting at 45, and mobile users were bouncing before the page even loaded.Unoptimized product images (some over 2MB each)
14 apps installed, 8 of which were unused
Heavy theme with bloated JavaScript
No lazy loading on collection pages
Key Issues Identified:
3The Solution
I took a methodical approach, tackling the biggest wins first:Compressed all product images (saved 4GB of bandwidth monthly)
Implemented lazy loading for below-fold content
Set up automatic image optimization for new uploads Removed 8 unused apps
Replaced 2 heavy apps with lighter alternatives
Cleaned up 300+ lines of unused CSS
Minified and deferred non-critical JavaScript
Week 1: Image Optimization
Week 2: App Audit and Theme Cleanup
4The Results
| Metric | Before | After | Change |
|---|---|---|---|
| PageSpeed (Mobile) | 45 | 92 | +104% |
| Load Time | 6.2s | 1.8s | -71% |
| First Contentful Paint | 4.1s | 1.2s | -71% |
| Bounce Rate | 68% | 41% | -40% |
Business Impact:
5Key Takeaways
READY FOR RESULTS LIKE THIS?
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