---
title: kCFStreamPropertyConnectionIsExpensive
framework: cfnetwork
role: symbol
role_heading: Global Variable
path: cfnetwork/kcfstreampropertyconnectionisexpensive
---

# kCFStreamPropertyConnectionIsExpensive

A Boolean value that indicates if the connection is using a network interface that the system considers expensive.

## Declaration

```swift
let kCFStreamPropertyConnectionIsExpensive: CFString
```

## Discussion

Discussion If the connection hasn’t been established yet, the value is NULL.

## See Also

### Constants

- [kCFHTTPVersion3_0](cfnetwork/kcfhttpversion3_0.md)
- [kCFStreamNetworkServiceTypeAVStreaming](cfnetwork/kcfstreamnetworkservicetypeavstreaming.md)
- [kCFStreamNetworkServiceTypeResponsiveAV](cfnetwork/kcfstreamnetworkservicetyperesponsiveav.md)
- [kCFStreamNetworkServiceTypeResponsiveData](cfnetwork/kcfstreamnetworkservicetyperesponsivedata.md)
- [kCFStreamPropertyAllowConstrainedNetworkAccess](cfnetwork/kcfstreampropertyallowconstrainednetworkaccess.md)
- [kCFStreamPropertyAllowExpensiveNetworkAccess](cfnetwork/kcfstreampropertyallowexpensivenetworkaccess.md)