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# MTLIOPriority

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

```
enum MTLIOPriority
```

## Overview

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

## Topics

### I/O command queue priorities

[`MTLIOPriority.normal`](/documentation/Metal/MTLIOPriority/normal)

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

[`MTLIOPriority.low`](/documentation/Metal/MTLIOPriority/low)

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

[`MTLIOPriority.high`](/documentation/Metal/MTLIOPriority/high)

Sets a new input/output command queue’s priority to a high priority.


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