<!--
{
  "availability" : [
    "*: -",
    "iOS: 16.0.0 -",
    "iPadOS: 16.0.0 -",
    "macCatalyst: 16.0.0 -",
    "macOS: 13.0.0 -",
    "tvOS: 16.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 9.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "Swift",
  "identifier" : "/documentation/Swift/Clock/measure(isolation:_:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "Swift"
    ],
    "preciseIdentifier" : "s:12_Concurrency5ClockPAAE7measure9isolation_8DurationQzScA_pSgYi_yyYaKXEtYaKF"
  },
  "title" : "measure(isolation:_:)"
}
-->

# measure(isolation:_:)

```
func measure(isolation: isolated (any Actor)? = #isolation, _ work: () async throws -> Void) async rethrows -> Self.Instant.Duration
```

---

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)