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//===--- RecursiveOwnedParameter.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
//
//===----------------------------------------------------------------------===//
import TestsUtils
public let benchmarks =
BenchmarkInfo(
name: "RecursiveOwnedParameter",
runFunction: run_RecursiveOwnedParameter,
tags: [.validation, .api, .Array, .refcount])
// This test recursively visits each element of an array in a class and compares
// it with every value in a different array stored in a different class. The
// idea is to make sure that we can get rid of the overhead from guaranteed
// parameters.
// We use final since we are not interesting in devirtualization for the
// purposes of this test.
final
class ArrayWrapper {
var data: [Int]
init(_ count: Int, _ initialValue: Int) {
data = [Int](repeating: initialValue, count: count)
}
func compare(_ b: ArrayWrapper, _ iteration: Int, _ stopIteration: Int) -> Bool {
// We will never return true here by design. We want to test the full effect
// every time of retaining, releasing.
if iteration == stopIteration || data[iteration] == b.data[iteration] {
return true
}
return compare(b, iteration &+ 1, stopIteration)
}
}
@inline(never)
public func run_RecursiveOwnedParameter(_ n: Int) {
let numElts = 1_000
let a = ArrayWrapper(numElts, 0)
let b = ArrayWrapper(numElts, 1)
var result = 0
for _ in 0..<100*n {
if a.compare(b, 0, numElts) {
result += 1
}
}
let refResult = 100*n
check(result == refResult)
}
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