AnyHashableWithAClass.swift

//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2021 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//

// This benchmark tests AnyHashable's initializer that needs to dynamically
// upcast the instance to the type that introduces the Hashable
// conformance.

import TestsUtils

// 23% _swift_dynamicCast
// 23% _swift_release_
// 18% _swift_stdlib_makeAnyHashableUsingDefaultRepresentation
// 11% _swift_stdlib_makeAnyHashableUpcastingToHashableBaseType
// 16% _swift_retain_[n]
// 5% swift_conformsToProtocol
publicletbenchmarks=
BenchmarkInfo(
 name:"AnyHashableWithAClass",
 runFunction: run_AnyHashableWithAClass,
 tags:[.abstraction,.runtime,.cpubench],
 legacyFactor:500
)

classTestHashableBase:Hashable{
varvalue:Int
init(_ value:Int){
self.value = value
}

func hash(into hasher:inoutHasher){
 hasher.combine(value)
}

staticfunc==(
 lhs:TestHashableBase,
 rhs:TestHashableBase
)->Bool{
return lhs.value == rhs.value
}
}

classTestHashableDerived1:TestHashableBase{}
classTestHashableDerived2:TestHashableDerived1{}
classTestHashableDerived3:TestHashableDerived2{}
classTestHashableDerived4:TestHashableDerived3{}
classTestHashableDerived5:TestHashableDerived4{}

@inline(never)
publicfunc run_AnyHashableWithAClass(_ n:Int){
letc=TestHashableDerived5(10)
for_in0...(n*1000){
 _ =AnyHashable(c)
}
}