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Lab Findings

Deep-dive research into Shopify app performance patterns — the cases where raw grades don't tell the full story.

Defer Illusion
UserWay: 8 ms Load, 753 ms First-Click Freeze
8 ms page load 822 ms first click 753 ms long task
UserWay's accessibility widget earns a Grade C — but the grade understates the risk. It appears lightweight at page load (8 ms) because it defers 173 KB of JavaScript to the first user interaction, triggering 753 ms of main-thread blocking that directly harms Google's INP Core Web Vital.
accessibility INP Core Web Vitals Published 2026-05-28 Read finding →

More lab findings are published when systematic patterns emerge from the scan data. Every app page links back here when a dedicated finding exists.