axiom-swiftui-performance

What problem does it solve?

This skill helps engineers identify and fix performance bottlenecks in SwiftUI apps by using Instruments 26 to detect long view updates, unnecessary updates, and environment update costs, enabling targeted optimizations.

Core Features & Use Cases

• Profile SwiftUI with Instruments 26 to locate long view body updates and other expensive tasks.
• Analyze Cause & Effect Graphs to trace data flow and identify update propagation.
• Apply per-view dependencies and caching strategies to reduce unnecessary updates and improve scroll performance.
• Use cases include fixing laggy lists, reducing frame drops during fast scrolling, and isolating expensive UI work in large SwiftUI apps.

Quick Start

Run a profiling session using the SwiftUI template in Instruments, then inspect the Long View Body Updates lane and use the Cause & Effect Graph to identify the responsible state changes.