When should I use this skill instead of general performance tools?

Use this specifically when you suspect issues with Swift Concurrency, such as tasks queued but not executing, UI stutters during async work, or suspected actor-related delays.

What does the axiom-concurrency-profiling skill help with?

It provides expert guidance on using Xcode's Instruments to profile Swift async/await code, helping you find bottlenecks like actor contention and main thread blocking.

Does it provide code solutions for concurrency issues?

Yes, it includes specific Swift code patterns to fix common issues like offloading work from the MainActor or marking heavy work as nonisolated to increase parallelism.

Can it help with deadlocks in Swift Concurrency?

Absolutely. It helps identify thread pool exhaustion and the use of unsafe primitives like DispatchSemaphore that can lead to deadlocks in a cooperative thread model.

Axiom: Swift Concurrency Profiling

Name: Axiom: Swift Concurrency Profiling
Author: CharlesWiltgen

byCharlesWiltgen

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233

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Mobile Development

Profiles and optimizes Swift async/await performance using specialized Instruments workflows and concurrency debugging patterns.

The axiom-concurrency-profiling skill provides structured guidance for diagnosing and resolving performance bottlenecks in modern Apple platform development. It helps developers visualize task lifetimes, identify actor contention, and prevent thread pool exhaustion using the Swift Concurrency template in Instruments. By providing clear solution patterns for UI stutters and priority inversions, this skill enables the creation of highly responsive iOS, macOS, and watchOS applications built on the cooperative thread model.

Key Features

01Swift Concurrency Instruments template guidance

02233 GitHub stars

03Thread pool exhaustion and deadlock detection

04Task priority inversion troubleshooting

05Actor contention and visualization analysis

06Main thread blocking identification and offloading

Use Cases

01Eliminating UI stutters and freezes during heavy asynchronous operations

02Detecting and replacing unsafe blocking primitives in cooperative thread contexts

03Optimizing parallel data processing by reducing actor serialization

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add charleswiltgen/axiom axiom-concurrency-profiling

For use in Claude.ai and ChatGPT

Download Skill