---
title: qos
framework: dispatch
role: symbol
role_heading: Instance Property
path: dispatch/dispatchqueue/scheduleroptions/qos
---

# qos

The dispatch queue quality of service.

## Declaration

```swift
var qos: DispatchQoS
```

## See Also

### Inspecting Scheduler Options

- [flags](dispatch/dispatchqueue/scheduleroptions/flags.md)
- [group](dispatch/dispatchqueue/scheduleroptions/group.md)