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# Performance analysis

Measure and improve your app’s responsiveness.

## Overview

Use Instruments to detect hangs and hitches in your app, and to analyze long view body updates and frequently occurring SwiftUI updates that can contribute to hangs and hitches.

## Topics

### Essentials

  <doc://com.apple.documentation/documentation/Xcode/understanding-user-interface-responsiveness>

  <doc://com.apple.documentation/documentation/Xcode/understanding-hangs-in-your-app>

  <doc://com.apple.documentation/documentation/Xcode/understanding-hitches-in-your-app>

### Analyzing SwiftUI performance

  <doc://com.apple.documentation/documentation/Xcode/understanding-and-improving-swiftui-performance>


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