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71 lines
2.4 KiB
Swift
71 lines
2.4 KiB
Swift
//===--- DictionaryCopy.swift ---------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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// This benchmark checks for quadratic behavior while copying elements in hash
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// order between Dictionaries of decreasing capacity
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//
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// https://github.com/apple/swift/issues/45856
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import TestsUtils
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let t: [BenchmarkCategory] = [.validation, .api, .Dictionary]
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// We run the test at a spread of sizes between 1*x and 2*x, because the
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// quadratic behavior only happens at certain load factors.
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public let benchmarks = [
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BenchmarkInfo(name:"Dict.CopyKeyValue.16k",
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runFunction: copyKeyValue, tags: t, setUpFunction: { dict(16_000) }),
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BenchmarkInfo(name:"Dict.CopyKeyValue.20k",
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runFunction: copyKeyValue, tags: t, setUpFunction: { dict(20_000) }),
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BenchmarkInfo(name:"Dict.CopyKeyValue.24k",
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runFunction: copyKeyValue, tags: t, setUpFunction: { dict(24_000) }),
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BenchmarkInfo(name:"Dict.CopyKeyValue.28k",
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runFunction: copyKeyValue, tags: t, setUpFunction: { dict(28_000) }),
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BenchmarkInfo(name:"Dict.FilterAllMatch.16k",
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runFunction: filterAllMatch, tags: t, setUpFunction: { dict(16_000) }),
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BenchmarkInfo(name:"Dict.FilterAllMatch.20k",
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runFunction: filterAllMatch, tags: t, setUpFunction: { dict(20_000) }),
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BenchmarkInfo(name:"Dict.FilterAllMatch.24k",
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runFunction: filterAllMatch, tags: t, setUpFunction: { dict(24_000) }),
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BenchmarkInfo(name:"Dict.FilterAllMatch.28k",
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runFunction: filterAllMatch, tags: t, setUpFunction: { dict(28_000) }),
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]
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var dict: [Int: Int]?
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func dict(_ size: Int) {
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dict = Dictionary(uniqueKeysWithValues: zip(1...size, 1...size))
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}
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@inline(never)
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func copyKeyValue(n: Int) {
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for _ in 1...n {
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var copy = [Int: Int]()
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for (key, value) in dict! {
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copy[key] = value
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}
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check(copy.count == dict!.count)
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}
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}
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// Filter with a predicate returning true is essentially the same loop as the
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// one in copyKeyValue above.
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@inline(never)
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func filterAllMatch(n: Int) {
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for _ in 1...n {
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let copy = dict!.filter { _ in true }
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check(copy.count == dict!.count)
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}
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}
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