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//===--- LazyFilter.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 test checks performance of creating an array from lazily filtered
// collections.
import TestsUtils
public let benchmarks = [
BenchmarkInfo(name: "LazilyFilteredArrays2",
runFunction: run_LazilyFilteredArrays,
tags: [.validation, .api, .Array],
setUpFunction: { blackHole(filteredRange) },
legacyFactor: 100),
BenchmarkInfo(name: "LazilyFilteredRange",
runFunction: run_LazilyFilteredRange,
tags: [.validation, .api, .Array],
legacyFactor: 10),
BenchmarkInfo(
name: "LazilyFilteredArrayContains",
runFunction: run_LazilyFilteredArrayContains,
tags: [.validation, .api, .Array],
setUpFunction: {
multiplesOfThree = Array(1..<500).lazy.filter { $0 % 3 == 0 } },
tearDownFunction: { multiplesOfThree = nil },
legacyFactor: 100),
]
@inline(never)
public func run_LazilyFilteredRange(_ n: Int) {
var res = 123
let c = (1..<100_000).lazy.filter { $0 % 7 == 0 }
for _ in 1...n {
res += Array(c).count
res -= Array(c).count
}
check(res == 123)
}
let filteredRange = (1..<1_000).map({[$0]}).lazy.filter { $0.first! % 7 == 0 }
@inline(never)
public func run_LazilyFilteredArrays(_ n: Int) {
var res = 123
let c = filteredRange
for _ in 1...n {
res += Array(c).count
res -= Array(c).count
}
check(res == 123)
}
fileprivate var multiplesOfThree: LazyFilterCollection<Array<Int>>?
@inline(never)
fileprivate func run_LazilyFilteredArrayContains(_ n: Int) {
let xs = multiplesOfThree!
for _ in 1...n {
var filteredCount = 0
for candidate in 1..<500 {
filteredCount += xs.contains(candidate) ? 1 : 0
}
check(filteredCount == 166)
}
}
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