Delivery Date and Time Picker — Performance Grade C
Heavy — high conversion risk
Delivery Date and Time Picker is a general Shopify store enhancement app for Shopify that has been assigned Grade C by StackConflict’s independent benchmark — a below-average classification in our A–D grading scale. The grade is driven by its JavaScript payload: 178.31 KB — a heavy JavaScript bundle that will delay first-paint on slower mobile connections. Live store CPU measurement is in progress — StackConflict’s profiler runs nightly on real Shopify storefronts.
StackConflict’s profiler measures apps on real Shopify storefronts with a 4× mobile CPU throttle to capture actual merchant-side impact. Live CPU data for Delivery Date and Time Picker will appear here automatically once the profiler completes its next run. The payload grade (C) is based on the measured 178.31 KB JavaScript bundle — larger bundles increase Time-to-Interactive on slower mobile connections regardless of CPU cost.
Verdict (Grade C — Heavy): If Shopify store speed and mobile conversion are priorities, merchants should evaluate lighter alternatives before committing to Delivery Date and Time Picker. StackConflict has benchmarked Coming Soon and Store Locator in the same general category — both carry Grade A or B ratings with significantly lower payload and CPU profiles. The performance difference compounds on mobile-first stores where JavaScript parse, compile, and execution times are amplified by device limitations.
Lab Results
| Metric | Value | Grade |
|---|---|---|
| JS Payload | 178.31 KB | C |
| CPU Execution | Pending live store measurement | ? |
| Cumulative Layout Shift | 0.0 | A |
| Overall Grade | — | C |
| Category | General | — |
| Last tested | 2026-06-04 | — |
Lab Verdict
Grade C driven by large download payload. Monitor mobile conversion impact carefully.
Grading Scale
Each app is graded across three independent dimensions. The final grade is the worst of the three — no dimension can be hidden by a good score elsewhere.
| Grade | Payload | CPU (desktop) | CLS | Risk |
|---|---|---|---|---|
| A | ≤ 30 KB | ≤ 50 ms | < 0.1 | Lightweight — zero friction |
| B | ≤ 150 KB | ≤ 150 ms | < 0.25 | Acceptable — monitor on mobile |
| C | ≤ 500 KB | ≤ 500 ms | < 0.5 | Heavy — high conversion risk |
| D | > 500 KB | > 500 ms | ≥ 0.5 | Critical — avoid on mobile stores |
Faster Alternatives
These general apps have earned a Grade A or B in our lab and are drop-in alternatives worth evaluating:
Real-World Production Benchmarks
StackConflict replayed 3 distinct merchant bundle variants — each representing a different merchant’s enabled feature set.
| Metric | Value |
|---|---|
| Median CPU (production variants) | 17 ms |
| Best-case merchant config | 14 ms |
| Worst-case merchant config | 18 ms |
| Merchant variants sampled | 3 |
Best case: 14 ms, worst case: 18 ms. The spread between best and worst case reflects how much the app’s JavaScript footprint changes when merchants enable heavy features (AI chatbots, video reviews, complex filter UIs, etc.).
About This Test
StackConflict measures app performance on real live Shopify merchant stores. Each app is profiled using a Playwright-controlled browser with 4× CPU throttle and mobile viewport — matching Google Lighthouse’s mid-range Android benchmark. V8 CPU cost is the ScriptDuration delta captured via Chrome DevTools Protocol. Results are the median across multiple live stores to filter out theme noise.
Install Delivery Date and Time Picker
Data sourced from the StackConflict Lab. Last updated 2026-06-04.