# sample-iOS-Profiling

**Repository Path**: mirrors_NativeScript/sample-iOS-Profiling

## Basic Information

- **Project Name**: sample-iOS-Profiling
- **Description**: Performance comparison of popular cross-platform frameworks
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2023-02-13
- **Last Updated**: 2026-03-30

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# iOS
### Scrolling UITableView
A constantly scrolling UITableView. Has different row heights. Has custom cells with recycling, three UILabels in each cell. Objective-C code implementation is compared with the same JavaScript code in NativeScript for iOS. The apps were designed to keep constant 60 FPS.

Projects:
 - _iOS/TNSScriptList_ - Objective-C implementation
 - _iOS/TNSNativeList_ - NativeScript for iOS implementation (without modules)
 - _iOS/TNSCrossList - NativeScript for iOS implementation (with modules)

For the _TNSScriptList_ app you will have to execute `tns platform add ios`, `tns prepare ios` and use the generated Xcode project in `platforms\ios`.

The CPU and GPU samples are taken with the Xcode instruments. Open the Xcode projects go to Product > Profile. The Memory usage is recorded in Xcode with the projects built in Release. The 

The device used is iPhone 5S with iOS8.1.3

#### Native (Objective-C)
 - Memory: ~6.4MB
 - CPU Activity: 31.3% Foreground, ~27% Graphics
 - GPU Driver FPS: ~59

#### NativeScript without modules (NativeScript for iOS)
 - Memory: ~13MB and raises to flat at 48MB
 - CPU: 38% Foreground, ~27% Graphics
 - GPU Driver FPS: ~59

#### NativeScript with modules (NativeScript for iOS + Cross Platform Modules)
 - Memory: ~27.5MB
 - CPU Activity: 39% Foreground, ~17% Graphics
 - GPU Driver FPS: ~59
 
#### XamarinList (Xamarin application without Xamarin.Forms)
 - Memory: ~19MB (Instruments > Allocation > Persistent)
 - CPU Activity: 35.5% Foreground, ~27% Graphics
 - GPU Driver FPS: ~59
 
#### Summary

Overall the additional memory consumed is due to the JS heap and the way JavaScript objects retain the native Objective-C objects.

At such a simple scenario the modules does not add excessive overhead, they even add the benefit of clipping the content under the status bar for you, and use somewhat smaller CPU Activity: Graphics processing.

The CPU usage with NativeScript for iOS is about 21% higher than using pure Objective-C.