# HangTimeMetric A metric that measures app hang time. ``` struct HangTimeMetric ``` ## Discussion This metric corresponds to the [`MetricResult.hangTime(_:)`](/documentation/MetricKit/MetricResult/hangTime(_:)) case. It appears in both [`intervalEntries`](/documentation/MetricKit/MetricReport/intervalEntries) and [`stateEntries`](/documentation/MetricKit/MetricReport/stateEntries) when state reporting is enabled. Hang durations that exceed 9 seconds of wall clock time are reported in the histogram’s final bucket. ## Topics ### Measurements [`let histogram: Histogram`](/documentation/MetricKit/HangTimeMetric/histogram) Histogram of application hang time durations. ## Relationships ### Conforms To [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Hashable`](/documentation/Swift/Hashable) [`Decodable`](/documentation/Swift/Decodable) [`Sendable`](/documentation/Swift/Sendable) [`Encodable`](/documentation/Swift/Encodable) [`Equatable`](/documentation/Swift/Equatable) --- 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)