# perform(schedule:_:) Submits a closure to the context’s queue for asynchronous execution. ``` @preconcurrency nonisolated func perform(schedule: NSManagedObjectContext.ScheduledTaskType = .immediate, _ block: @escaping @Sendable () throws -> T) async rethrows -> T ``` ## Parameters `schedule` The required execution schedule. For more information, see [`NSManagedObjectContext.ScheduledTaskType`](/documentation/CoreData/NSManagedObjectContext/ScheduledTaskType). `block` The closure to perform. ## Discussion --- Copyright © 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)