<!--
{
  "availability" : [
    "iOS: 12.0.0 -",
    "iPadOS: 12.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.14.0 -",
    "tvOS: 12.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 5.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "Dispatch",
  "identifier" : "/documentation/Dispatch/DispatchConcurrentQueue",
  "metadataVersion" : "0.1.0",
  "role" : "Class",
  "symbol" : {
    "kind" : "Class",
    "modules" : [
      "Dispatch"
    ],
    "preciseIdentifier" : "c:objc(cs)OS_dispatch_queue_concurrent"
  },
  "title" : "DispatchConcurrentQueue"
}
-->

# DispatchConcurrentQueue

A custom dispatch queue that schedules tasks for concurrent execution.

```
class DispatchConcurrentQueue
```

## Overview

You do not create objects of this type directly. You receive a queue of the appropriate type when you create a new [`DispatchQueue`](/documentation/Dispatch/DispatchQueue) object.

## Topics

### Structures

[`struct Attributes`](/documentation/Dispatch/DispatchConcurrentQueue/Attributes)

### Initializers

[`convenience init(label: String, qos: DispatchQoS, attributes: DispatchConcurrentQueue.Attributes, autoreleaseFrequency: DispatchQueue.AutoreleaseFrequency, target: DispatchQueue?)`](/documentation/Dispatch/DispatchConcurrentQueue/init(label:qos:attributes:autoreleaseFrequency:target:))

## Relationships

### Inherits From

[`DispatchQueue`](/documentation/Dispatch/DispatchQueue)

### Conforms To

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`Sendable`](/documentation/Swift/Sendable)

[`Equatable`](/documentation/Swift/Equatable)

[`CVarArg`](/documentation/Swift/CVarArg)

[`TaskExecutor`](/documentation/Swift/TaskExecutor)

[`Executor`](/documentation/Swift/Executor)

[`Scheduler`](/documentation/Combine/Scheduler)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Hashable`](/documentation/Swift/Hashable)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)