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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2025 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import SWBUtil
package import Testing
private let asyncMeasureLock = AsyncLockedValue<Void>(())
package protocol PerfTests {
func measure(subiterations: Int, _ body: () async throws -> Void) async rethrows
}
extension PerfTests {
package func measure(subiterations: Int = 1, _ body: () async throws -> Void) async rethrows {
let iterationCount = getEnvironmentVariable("CI")?.boolValue == true ? 1 : 10
let time = try await asyncMeasureLock.withLock { _ in
var timings: [Duration] = []
for _ in 0..<iterationCount {
for _ in 0..<subiterations {
try await timings.append(SuspendingClock.suspending.measure {
try await body()
})
}
}
return timings.reduce(Duration.seconds(0), { $0 + ($1 / Double(timings.count)) }) // average
}
_ = time
}
}
extension Trait where Self == Testing.ConditionTrait {
package static var performance: Self {
enabled("Skipping performance test") {
#if DEBUG
return getEnvironmentVariable("SWB_PERF_TESTS_ENABLE")?.boolValue ?? false
#else
return true
#endif
}
}
}
// Used to make printing for debugging purposes easier.
private let shouldPrint = getEnvironmentVariable("SWB_PERF_TESTS_ENABLE_DEBUG_PRINT")?.boolValue ?? false
public func perfPrint(_ message: String) {
if shouldPrint {
print(message)
}
}
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