Back In Stock vs Delivery Date and Time Picker: Shopify Performance Comparison
Back In Stock wins with Grade B vs Grade C — a one-grade performance difference that compounds on mobile devices.
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 | Back In Stock | Delivery Date and Time Picker | Faster |
|---|---|---|---|
| Overall Grade | B | C | Back In Stock |
| JS Payload | 132.07 KB | 178.31 KB | Back In Stock |
| CPU Desktop | ⏳ Pending | 4 ms | — |
| CPU Mobile | ⏳ Pending | 19 ms | — |
| Layout Shift | 0.0 | 0.0 | Back In Stock |
Mobile CPU measured with 4× CDP throttle (mid-range Android). Tested 2026-06-04.
Back In Stock — The Faster Option (Grade B)
Back In Stock scores Grade B with a JS payload of 132.07 KB. Mobile CPU: ⏳ live store measurement pending. It passes every StackConflict threshold for payload, CPU, and layout stability — making it safe to install on any storefront including mobile-first stores where Time-to-Interactive directly impacts conversion.
View full Back In Stock 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 and 4 ms desktop CPU execution. Mobile CPU: 19 ms. 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 Back In Stock
- You need its specific features and can monitor its mobile impact
- Your other apps are lightweight (Grade A) so there is headroom
- You are on desktop-skewed traffic where CPU cost matters less
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
Winner: Back In Stock — Back In Stock wins with Grade B vs Grade C — a one-grade performance difference that compounds on mobile devices.
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.