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debugging-instruments

Profile iOS apps using LLDB, Memory Graph Debugger, Instruments, and XCTest.

981|50|Updated Mar 3, 2026
Search Tags:#performance#debugging#profiling#ios#memory leaks#instruments#lldb
One-click install
npx skills add https://github.com/dpearson2699/swift-ios-skills --skill debugging-instruments-dpearson2699
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: debugging-instruments
Source: https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/debugging-instruments
Command: npx skills add https://github.com/dpearson2699/swift-ios-skills --skill debugging-instruments-dpearson2699

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers identify and resolve performance bottlenecks, memory leaks, crashes, and build failures in iOS applications.

Core Features & Use Cases

  • Runtime Debugging: Utilize LLDB for step-by-step code inspection, breakpoint management, and expression evaluation.
  • Memory Analysis: Employ the Memory Graph Debugger and Instruments (Allocations, Leaks) to detect and fix memory issues like retain cycles.
  • Performance Profiling: Use Instruments (Time Profiler, Core Animation, SwiftUI) to pinpoint CPU, rendering, and UI performance problems.
  • Build Triage: Understand and resolve compiler errors and dependency conflicts.
  • Use Case: Your app is experiencing slow scrolling in a list. Use this Skill to profile the list with Instruments' Time Profiler and SwiftUI templates to find the cause of the slowdown.

Quick Start

Use the debugging-instruments skill to analyze memory usage in your app by running the Allocations template in Instruments.

Frequently Asked Questions about debugging-instruments

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I find memory leaks and retain cycles in an iOS app?▼

To find memory leaks and retain cycles, use Xcode's Memory Graph Debugger alongside the Instruments Allocations and Leaks templates to detect and resolve memory issues in your iOS application.

What causes slow scrolling in iOS lists and how can I profile it?▼

Slow scrolling stems from CPU or rendering bottlenecks on the main thread. Profile the list using the Instruments Time Profiler and SwiftUI templates to pinpoint the exact cause of the UI slowdown.

How do I inspect variables and manage breakpoints during iOS runtime debugging?▼

For runtime debugging and code inspection, use LLDB to perform step-by-step execution, manage breakpoints, and evaluate expressions directly within your iOS debugging session.

Can I profile CPU, energy, and network usage all together for iOS apps?▼

Yes, you can profile CPU, memory, energy, and network usage simultaneously through detailed GUI-based Instruments templates to identify broader performance bottlenecks in iOS apps.

Does this approach help resolve Xcode compiler errors and dependency conflicts?▼

Yes, this approach includes build triage capabilities that help you understand and resolve compiler errors and dependency conflicts that cause iOS build failures.

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