swiftui-performance-analyzer

Scans SwiftUI code for performance issues — from known anti-patterns like formatters in view bodies to context-dependent problems like expensive operations amplified inside scrolling cells.

What It Does

• Detects 10 known anti-patterns (file I/O in view body, expensive formatters, image processing, whole-collection dependencies, missing lazy loading, and more)
• Identifies context-dependent performance issues (same code is fine in a settings screen but devastating in a List cell)
• Correlates findings that compound into higher severity
• Produces a Performance Health Score (SMOOTH / JANKY / BROKEN)

How to Use

Natural language:

• "My SwiftUI app has janky scrolling"
• "Check my code for performance issues"
• "My views are updating too often"
• "App feels slow during scrolling"

Explicit command:

/axiom:audit swiftui-performance

Related

• swiftui-performance skill — use to profile and fix the issues this auditor finds, including Instruments workflows
• swiftui-debugging skill — systematic view update diagnosis
• memory-auditor agent — overlaps on timer/observer leaks in views