---
title: MTLIOPriority
framework: metal
role: symbol
role_heading: Enumeration
path: metal/mtliopriority
---

# MTLIOPriority

Designates the priority for a new input/output command queue.

## Declaration

```swift
enum MTLIOPriority
```

## Overview

Overview Set a new input/output command queue’s priority that you create with an MTLIOCommandQueueDescriptor instance by setting its priority property. Create a queue that minimizes an asset’s loading latency by setting a descriptor’s priority to MTLIOPriority.high.

## Topics

### I/O command queue priorities

- [MTLIOPriority.normal](metal/mtliopriority/normal.md)
- [MTLIOPriority.low](metal/mtliopriority/low.md)
- [MTLIOPriority.high](metal/mtliopriority/high.md)

### Initializers

- [init(rawValue:)](metal/mtliopriority/init(rawvalue:).md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### I/O command queues

- [MTLIOCommandQueue](metal/mtliocommandqueue.md)
- [MTLIOCommandQueueDescriptor](metal/mtliocommandqueuedescriptor.md)
- [MTLIOCommandQueueType](metal/mtliocommandqueuetype.md)
- [MTLIOScratchBufferAllocator](metal/mtlioscratchbufferallocator.md)
- [MTLIOScratchBuffer](metal/mtlioscratchbuffer.md)