---
title: MTLIOCommandQueueType.concurrent
framework: metal
role: symbol
role_heading: Case
path: metal/mtliocommandqueuetype/concurrent
---

# MTLIOCommandQueueType.concurrent

Sets a new input/output command queue’s type to a queue that runs commands concurrently.

## Declaration

```swift
case concurrent
```

## See Also

### I/O command queue types

- [MTLIOCommandQueueType.serial](metal/mtliocommandqueuetype/serial.md)