Will this work for any Swift-based mobile app?

While it includes specific context for the Leavn app, the underlying patterns for thread management and lazy loading are applicable to all modern iOS development.

Does it support SwiftUI-specific optimizations?

Absolutely. It focuses on SwiftUI patterns such as replacing standard stacks with LazyVStack and deferring transformations until views appear on screen.

How does this skill identify performance issues?

The skill uses regex and grep to search for heavy operations like CGContext rendering or expensive computations inside SwiftUI View bodies that should be moved to background threads.

How does it optimize data access?

It identifies O(n) array lookups and suggests refactoring them into O(1) lookups using Sets or Dictionaries to improve computational efficiency.

Can it help with Swift Concurrency implementation?

Yes, it refactors blocking main thread code into detached tasks and uses MainActor to safely update the UI once background work is complete.

Performance Optimizer

Name: Performance Optimizer
Author: willsigmon

bywillsigmon

•

Mobile Development

Identifies and resolves performance bottlenecks in iOS applications by optimizing UI rendering, main thread operations, and data lookup efficiency.

The Performance Optimizer skill is a specialized tool designed to analyze and enhance the responsiveness of Swift-based mobile applications. It systematically scans codebases for common performance pitfalls such as heavy computations in View bodies, main thread blocking operations, and inefficient list rendering. By automating the transition to background tasks using Swift Concurrency and implementing lazy loading patterns, this skill ensures smooth scrolling and high-performance user interfaces, particularly for complex views and data-heavy collections.

主な機能

01Converts standard views to lazy-loading containers for improved memory usage

02Implements caching mechanisms within ViewModels to reduce redundant processing

03Automates implementation of Swift Concurrency and background task patterns

049 GitHub stars

05Detects main thread blocking operations and heavy UI computations

06Optimizes data lookups by refactoring O(n) arrays into O(1) sets or maps

ユースケース

01Offloading expensive regex or image rendering from the main UI thread

02Fixing stuttering or laggy scrolling in long lists or complex feeds

03Reducing high CPU usage caused by frequent computed property recalculations

主な機能

01Converts standard views to lazy-loading containers for improved memory usage

02Implements caching mechanisms within ViewModels to reduce redundant processing

03Automates implementation of Swift Concurrency and background task patterns

049 GitHub stars

05Detects main thread blocking operations and heavy UI computations

06Optimizes data lookups by refactoring O(n) arrays into O(1) sets or maps

ユースケース

01Offloading expensive regex or image rendering from the main UI thread

02Fixing stuttering or laggy scrolling in long lists or complex feeds

03Reducing high CPU usage caused by frequent computed property recalculations