Hello, I'm attempting to automate some performance tests we currently do manually using signposts and Instruments. It looks like XCTOSSignpostMetric is the perfect tool for the job, but I can't get it to play nicely. If I use the pre-defined signpost metric constants (customNavigationTransitionMetric, scrollDecelerationMetric, etc), it works fine. If I use a custom signpost using the XCTOSSignpostMetric.init(subsystem: category: name:) initializer, nothing happens. The documentation is very sparse on this topic and Googling, Binging, Githubing and Twittering have come up empty. I reduced the issue to the smallest example I could ( https://github.com/tspike/SignpostTest ). What am I doing wrong? Thanks, Tres Environment details: macOS 11.6 Xcode 12.5.1 iOS 14.6 iPhone SE 1st Gen In the app: ... let signpostLog = OSLog(subsystem: "com.tspike.signpost", category: "signpost") let signpostName: StaticString = "SignpostTest" @main struct SignpostTestApp: App { init() { os_signpost(.begin, log: signpostLog, name: signpostName) DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(500), execute: { os_signpost(.end, log: signpostLog, name: signpostName) }) } ... } In the test    func testSignposts() throws {     let app = XCUIApplication() // No performance data let metric = XCTOSSignpostMetric.init(subsystem: "com.tspike.signpost",  category: "signpost",  name: "SignpostTest") // Works as expected // let metric = XCTOSSignpostMetric.applicationLaunch let options = XCTMeasureOptions() options.iterationCount = 1 measure(metrics: [metric], options: options, block: { app.launch() }) }