/axiom:audit-swiftui-performance

Scan SwiftUI code for performance anti-patterns that cause frame drops (launches swiftui-performance-analyzer agent).

Command

bash

/axiom:audit-swiftui-performance

What It Checks

Critical Impact (Frame Drops)

File I/O in body: Blocking the main thread during render
Heavy Initialization: Creating DateFormatter or NumberFormatter inside view body

High Impact

Image Processing: Resizing/filtering images inside the body (should be backgrounded)
Collection Dependencies: Using .count on large collections instead of stable IDs

Medium Impact

Lazy Loading: Missing LazyVStack/LazyHStack in scroll views
Environment Churn: Frequently changing environment values triggering redraws
View Identity: Implicit AnyView usage breaking diffing

When to Use

Scrolling is janky or stutters
Animations drop frames
View updates feel sluggish
Device gets hot during simple usage

/axiom:audit-swiftui-nav - Check navigation correctness
swiftui-performance - Optimization guide