Boomtrain vs Variant Option Product Options: Shopify Performance Comparison
Both apps score Grade B — Variant Option Product Options has the edge with 3 ms vs 21 ms desktop CPU execution.
Both apps provide personalization and product recommendations functionality for Shopify stores. This page presents StackConflict’s independent lab results for both — measured in a clean-room environment with no other apps installed.
Head-to-Head Metrics
| Metric | Boomtrain | Variant Option Product Options | Faster |
|---|---|---|---|
| Overall Grade | B | B | Tie |
| JS Payload | 96.54 KB | 53.55 KB | Variant Option Product Options |
| CPU Desktop | 21 ms | 3 ms | Variant Option Product Options |
| CPU Mobile | 64 ms | 19 ms | Variant Option Product Options |
| Layout Shift | 0.0 | 0.0 | Boomtrain |
Mobile CPU measured with 4× CDP throttle (mid-range Android). Tested 2026-05-30.
Variant Option Product Options — The Faster Option (Grade B)
Variant Option Product Options scores Grade B with a JS payload of 53.55 KB and 3 ms desktop CPU execution. Mobile CPU: 19 ms. 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 Variant Option Product Options speed report →
Boomtrain — The Heavier Option (Grade B)
Boomtrain scores Grade B with a JS payload of 96.54 KB and 21 ms desktop CPU execution. Mobile CPU: 64 ms. Performance is acceptable but worth monitoring, particularly on stores with high mobile traffic share.
View full Boomtrain speed report →
When to Choose Boomtrain
- 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 Variant Option Product Options
- 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
Performance Verdict
Result: Comparable — Both apps score Grade B — Variant Option Product Options has the edge with 3 ms vs 21 ms desktop CPU execution.
Install Variant Option Product Options →
About This Test
StackConflict measures each Shopify app in an isolated clean-room environment — a single development store, no other scripts, Playwright-controlled browser. V8 CPU cost is the ScriptDuration delta before and after injection. CLS is captured from the same browser session. Results represent the median of three independent runs with outliers removed.
Data from the StackConflict Lab. Last updated 2026-05-30.