performance-profiling

Profile iOS/macOS app CPU, memory, launch time, and energy with Instruments.

Updated Mar 1, 2026

Search Tags:#performance #xcode #instruments #memory-profiling #time-profiler #hang-detection #energy-diagnostics

Ready to run

npx skills add https://github.com/mazicimert/RunDom --skill performance-profiling-mazicimert

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: performance-profiling
Source: https://github.com/mazicimert/RunDom/tree/main/.claude/skills/performance/profiling
Command: npx skills add https://github.com/mazicimert/RunDom --skill performance-profiling-mazicimert

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Profiling performance helps identify bottlenecks and energy hotspots that degrade user experience.

Core Features & Use Cases

Time Profiler for CPU analysis and hang detection
Memory profiling for leaks and growth with Allocations/Leaks
Energy diagnostics for battery impact and thermal state
End-to-end guidance for profiling on real devices and production-like data

Quick Start

Start a profiling session in Instruments (Time Profiler, Allocations, and Energy) on a representative build and reproduce the user flow.

Frequently Asked Questions about performance-profiling

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

FAQPage Schema

How do I profile app performance with Xcode Instruments to identify bottlenecks?▼

Profile app performance by running Instruments on a representative build to reproduce user flows. Use Time Profiler for CPU analysis, Allocations for memory leaks, and Energy Diagnostics to identify bottlenecks and energy hotspots degrading user experience.

What's the best way to detect memory leaks and growth in an iOS app?▼

Detect memory leaks and growth by using the Allocations and Leaks instruments in Xcode Instruments. Profile your app during development or QA to identify memory bottlenecks and apply recommended fixes for unresolved memory growth.

How does Time Profiler work for CPU analysis and hang detection?▼

Time Profiler analyzes CPU usage by sampling your app's call stacks during execution, enabling hang detection. Profile on real devices with production-like data to accurately identify CPU bottlenecks causing slow launches or unresponsive user interfaces.

Can I use Energy Diagnostics to measure battery impact and thermal state?▼

Yes, use Energy Diagnostics to measure battery impact and thermal state during app profiling. Reproduce energy-draining user flows on real devices to identify energy hotspots and apply actionable fixes to reduce battery drain and thermal pressure.

When do I need to run performance profiling during the development cycle?▼

Run performance profiling during development, QA, or pre-release phases when users report hangs, leaks, slow launches, or energy drain. Profiling on real devices with production-like data helps identify bottlenecks before they reach end users.

Why should I profile on real devices instead of simulators for performance bottlenecks?▼

Profile on real devices to capture accurate CPU, memory, launch time, and energy metrics. Simulators do not reflect true hardware constraints, thermal states, or battery impact, leading to missed bottlenecks and inaccurate energy diagnostics during development.