Resource Owner Without Deinit (ARCH9082)
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Key swift.performance.resource-owner-without-deinit · Severity warning · Category performance
Flags a class holding a Timer, CADisplayLink, AVPlayer, observer token or open stream with no deinit to release it.
Incorrect
Section titled “Incorrect”final class Ticker { var timer: Timer? }Correct
Section titled “Correct”final class Ticker { var timer: Timer?; deinit { timer?.invalidate() } }Invalidate / cancel the owned resource in deinit.