Buy with Prime vs Delivery Date and Time Picker: Shopify Performance Comparison
Both apps score Grade C — Buy with Prime has the edge with 19 ms vs 20 ms desktop CPU execution.
Both apps provide general Shopify store enhancement functionality for Shopify stores. This page presents StackConflict’s independent benchmark results for both — measured on real live Shopify merchant stores with 4× mobile CPU throttle.
Head-to-Head Metrics
| Metric | Buy with Prime | Delivery Date and Time Picker | Faster |
|---|---|---|---|
| Overall Grade | C | C | Tie |
| JS Payload | 184.43 KB | 178.31 KB | Delivery Date and Time Picker |
| CPU Desktop | ⏳ Pending | ⏳ Pending | — |
| CPU Mobile | ⏳ Pending | ⏳ Pending | — |
| Layout Shift | 0.0006 | 0.0 | Delivery Date and Time Picker |
Mobile CPU measured with 4× CDP throttle (mid-range Android). Tested 2026-06-04.
Buy with Prime — The Faster Option (Grade C)
Buy with Prime scores Grade C with a JS payload of 184.43 KB. Mobile CPU: ⏳ live store measurement pending. Even as the faster of the two options, merchants on mobile-heavy stores should weigh its impact on their combined app stack.
View full Buy with Prime speed report →
Delivery Date and Time Picker — The Heavier Option (Grade C)
Delivery Date and Time Picker scores Grade C with a JS payload of 178.31 KB. Mobile CPU: ⏳ live store measurement pending. This places it in the heavier half of StackConflict’s benchmark dataset — merchants running mobile-first stores should evaluate whether the feature value justifies the performance tradeoff.
View full Delivery Date and Time Picker speed report →
When to Choose Buy with Prime
- Its unique feature set has no lighter equivalent in StackConflict’s database
- Your store traffic is predominantly desktop
- You have already removed or lightened other heavy scripts to compensate
When to Choose Delivery Date and Time Picker
- Its unique feature set has no lighter equivalent in StackConflict’s database
- Your store traffic is predominantly desktop
- You have already removed or lightened other heavy scripts to compensate
Performance Verdict
Result: Comparable — Both apps score Grade C — Buy with Prime has the edge with 19 ms vs 20 ms desktop CPU execution.
Both apps carry Grade C — see StackConflict’s full General rankings for lighter alternatives.
About This Test
StackConflict measures each Shopify app on real live Shopify merchant stores — Playwright-controlled browser, 4× CPU throttle, mobile viewport (matching Google Lighthouse mid-range Android). V8 CPU cost is the ScriptDuration delta captured via Chrome DevTools Protocol. CLS is captured from the same browser session. Results are the median across multiple stores with outliers removed.
Data from the StackConflict Lab. Last updated 2026-06-04.