# Performance and metrics Measure, investigate, and address the use of system resources and issues impacting performance using Instruments and Xcode Organizer. ## Topics ### Essentials [Improving your app’s performance](/documentation/Xcode/improving-your-app-s-performance) Model, measure, and boost the performance of your app by using a continuous-improvement cycle. [Analyzing the performance of your shipping app](/documentation/Xcode/analyzing-the-performance-of-your-shipping-app) View power and performance metrics for apps you distribute through the App Store. ### Responsiveness [Analyzing responsiveness issues in your shipping app](/documentation/Xcode/analyzing-responsiveness-issues-in-your-shipping-app) Identify responsiveness issues your users encounter, and use the hang and hitch data in Xcode Organizer to determine which issues are most important to fix. [Improving app responsiveness](/documentation/Xcode/improving-app-responsiveness) Create a user experience that feels responsive by removing hangs and hitches from your app. [Understanding user interface responsiveness](/documentation/Xcode/understanding-user-interface-responsiveness) Make your app more responsive by examining the event-handling and rendering loop. [Understanding and improving SwiftUI performance](/documentation/Xcode/understanding-and-improving-swiftui-performance) Identify and address long-running view updates, and reduce the frequency of updates. [Understanding hangs in your app](/documentation/Xcode/understanding-hangs-in-your-app) Determine the cause for delays in user interactions by examining the main thread and the main run loop. [Understanding hitches in your app](/documentation/Xcode/understanding-hitches-in-your-app) Determine the cause of interruptions in motion by examining the render loop. [Diagnosing performance issues early](/documentation/Xcode/diagnosing-performance-issues-early) Diagnose potential performance issues in your app during development and testing with the Thread Performance Checker tool in Xcode. [Reducing your app’s launch time](/documentation/Xcode/reducing-your-app-s-launch-time) Create a more responsive experience with your app by minimizing time spent in startup. [Reducing terminations in your app](/documentation/Xcode/reduce-terminations-in-your-app) Minimize how frequently the system stops your app by addressing common termination reasons. ### Processor usage [Addressing CPU bottlenecks](/documentation/Xcode/addressing-cpu-bottlenecks) Locate and fix pipeline stalls, cache misses, and other performance issues. [Analyzing CPU usage with the Processor Trace instrument](/documentation/Xcode/analyzing-cpu-usage-with-processor-trace) Identify code where your app uses the CPU inefficiently. [Analyzing CPU profiles with call tree views](/documentation/Xcode/analyzing-cpu-profiles-with-call-tree-views) Use call tree visualizations to find performance bottlenecks in Instruments. ### Memory and size [Reducing your app’s memory use](/documentation/Xcode/reducing-your-app-s-memory-use) Improve your app’s performance by analyzing memory-use metrics and making changes to maximize memory efficiency. [Reducing your app’s size](/documentation/Xcode/reducing-your-app-s-size) Measure your app’s size, optimize its assets and settings, and adopt technologies that help streamline installation over a mobile internet connection. ### Graphics [Analyzing the performance of your Metal app](/documentation/Xcode/Analyzing-the-performance-of-your-Metal-app) Ensure consistent, smooth rendering by profiling your app’s frame time. [Analyzing the memory usage of your Metal app](/documentation/Xcode/Analyzing-the-memory-usage-of-your-Metal-app) Keep your app alive in the background by managing its memory footprint. ### Power [Analyzing your app’s battery use](/documentation/Xcode/analyzing-your-app-s-battery-use) Increase the available use time for your app on a single battery charge by reducing your appʼs power consumption. [Measuring your app’s power use with Power Profiler](/documentation/Xcode/measuring-your-app-s-power-use-with-power-profiler) Profile your app’s power impact whether or not your device is connected to Xcode. [Reducing your app’s battery use](/documentation/Xcode/reducing-your-app-s-battery-use) Adopt design principles and recommended APIs to consume less power. ### Disk usage [Reducing disk writes](/documentation/Xcode/reducing-disk-writes) Improve your app’s responsiveness by optimizing how it writes data to permanent storage. [Reducing your app’s disk usage](/documentation/Xcode/reducing-your-app-s-disk-usage) Measure and minimize the space your app uses to store its files. [Monitoring your app’s storage metrics](/documentation/Xcode/monitoring-your-app-s-storage-metrics) Track your app’s storage footprint over time using Xcode Organizer to catch regressions in Documents & Data and App Size. ### Network ### Custom instruments [Creating custom modelers for intelligent instruments](/documentation/Xcode/creating-custom-modelers-for-intelligent-instruments) Create Custom Modelers with the CLIPS language and learn how the embedded rules engine works. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)