What is the advantage of using xctrace over the Instruments app?

xctrace allows for headless, automated profiling which is essential for CI/CD pipelines and programmatic performance analysis that doesn't require manual GUI interaction.

Does this skill support Xcode 26+?

Yes, it includes specific workarounds for Xcode 26+, such as using the --instrument flag instead of --template to avoid 'Document Missing Template' errors during export.

Does it work with physical iOS devices?

Yes, it provides commands to target specific physical devices using their UUIDs, provided Developer Mode is enabled on the hardware.

Can I use this for memory leak detection?

Absolutely. The skill provides specific command patterns for recording 'Leaks' and 'Allocations' instruments and exporting the resulting data to XML.

How do I export trace data to a readable format?

You can use the 'xcrun xctrace export' command combined with XPath queries to extract specific data tables from the .trace file into XML format for analysis.

xctrace CLI Reference

Name: xctrace CLI Reference
Author: CharlesWiltgen

byCharlesWiltgen

•

286

•

Mobile Development

Automates Xcode Instruments profiling and performance analysis using the xctrace command-line interface.

A comprehensive reference for the xctrace CLI, designed to help developers perform headless performance profiling on Apple platforms (iOS, macOS, watchOS, tvOS). It enables automated trace collection, programmatic analysis via XML export, and seamless integration into CI/CD pipelines. This skill provides specific patterns for recording CPU usage, memory allocations, leaks, and SwiftUI performance while offering solutions for common Xcode 26+ issues like template export errors, making it an essential tool for performance-conscious mobile developers.

主な機能

01Trace recording patterns for CPU, memory, leaks, and concurrency

02Automated Instruments profiling without the GUI

03Advanced XML export using XPath for programmatic data analysis

04286 GitHub stars

05CI/CD integration templates for performance regression testing

06Troubleshooting guides for symbolication and Xcode 26+ export errors

ユースケース

01Automating performance regression checks in GitHub Actions or GitLab CI

02Extracting specific metrics like SwiftUI body updates to XML for custom reporting

03Profiling apps on remote devices or simulators where a GUI is unavailable

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add charleswiltgen/axiom axiom-xctrace-ref

For use in Claude.ai and ChatGPT

Download Skill