---
title: target_system
framework: accelerate
role: symbol
role_heading: Instance Property
path: accelerate/bnnssparsityparameters/target_system
---

# target_system

## Declaration

```swift
var target_system: BNNSTargetSystem
```

## Discussion

Discussion Target System values for BNNSGetBestDataLayout* functions Due to architectural and microarchitectural changes between different types and generations of apple devices, the optimal packing of data varies from device to device. In order to determine the optimal repacking for a given device, the user may call the BNNSGetBestDataLayout* family of functions. These functions take an argument representing the Target System from the values provided by this enumeration.