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//===--- RemoveWhere.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 = [
// tests repeated remove(at:) calls in generic code
BenchmarkInfo(name: "RemoveWhereQuadraticStrings", runFunction: run_RemoveWhereQuadraticStrings, tags: [.validation, .api], setUpFunction: buildWorkload),
BenchmarkInfo(name: "RemoveWhereQuadraticInts", runFunction: run_RemoveWhereQuadraticInts, tags: [.validation, .api], setUpFunction: buildWorkload),
// tests performance of RangeReplaceableCollection.filter
BenchmarkInfo(name: "RemoveWhereFilterStrings", runFunction: run_RemoveWhereFilterStrings, tags: [.validation, .api], setUpFunction: buildWorkload),
BenchmarkInfo(name: "RemoveWhereFilterInts", runFunction: run_RemoveWhereFilterInts, tags: [.validation, .api], setUpFunction: buildWorkload),
// these two variants test the impact of reference counting and
// swapping/moving
BenchmarkInfo(name: "RemoveWhereMoveStrings", runFunction: run_RemoveWhereMoveStrings, tags: [.validation, .api], setUpFunction: buildWorkload),
BenchmarkInfo(name: "RemoveWhereMoveInts", runFunction: run_RemoveWhereMoveInts, tags: [.validation, .api], setUpFunction: buildWorkload),
BenchmarkInfo(name: "RemoveWhereSwapStrings", runFunction: run_RemoveWhereSwapStrings, tags: [.validation, .api], setUpFunction: buildWorkload),
BenchmarkInfo(name: "RemoveWhereSwapInts", runFunction: run_RemoveWhereSwapInts, tags: [.validation, .api], setUpFunction: buildWorkload),
// these test performance of filter, character iteration/comparison
BenchmarkInfo(name: "RemoveWhereFilterString", runFunction: run_RemoveWhereFilterString, tags: [.validation, .api], setUpFunction: buildWorkload),
BenchmarkInfo(name: "RemoveWhereQuadraticString", runFunction: run_RemoveWhereQuadraticString, tags: [.validation, .api], setUpFunction: buildWorkload),
]
extension RangeReplaceableCollection {
mutating func removeWhere_quadratic(where match: (Element) throws -> Bool) rethrows {
for i in indices.reversed() {
if try match(self[i]) {
remove(at: i)
}
}
}
mutating func removeWhere_filter(where match: (Element) throws -> Bool) rethrows {
try self = self.filter { try !match($0) }
}
}
extension RangeReplaceableCollection where Self: MutableCollection {
mutating func removeWhere_move(where match: (Element) throws -> Bool) rethrows {
guard var i = try firstIndex(where: match) else { return }
var j = index(after: i)
while j != endIndex {
let element = self[j]
if try !match(element) {
self[i] = element
formIndex(after: &i)
}
formIndex(after: &j)
}
removeSubrange(i...)
}
mutating func removeWhere_swap(where match: (Element) throws -> Bool) rethrows {
guard var i = try firstIndex(where: match) else { return }
var j = index(after: i)
while j != endIndex {
if try !match(self[i]) {
self.swapAt(i,j)
formIndex(after: &i)
}
formIndex(after: &j)
}
removeSubrange(i...)
}
}
func testQuadratic<C: RangeReplaceableCollection>(workload: inout C) {
var i = 0
workload.removeWhere_quadratic { _ in
i = i &+ 1
return i%8 == 0
}
}
func testFilter<C: RangeReplaceableCollection>(workload: inout C) {
var i = 0
workload.removeWhere_filter { _ in
i = i &+ 1
return i%8 == 0
}
}
func testMove<C: RangeReplaceableCollection & MutableCollection>(workload: inout C) {
var i = 0
workload.removeWhere_move { _ in
i = i &+ 1
return i%8 == 0
}
}
func testSwap<C: RangeReplaceableCollection & MutableCollection>(workload: inout C) {
var i = 0
workload.removeWhere_swap { _ in
i = i &+ 1
return i%8 == 0
}
}
let n = 10_000
let strings = (0..<n).map({ "\($0): A long enough string to defeat the SSO" })
let ints = Array(0..<n)
let str = String(repeating: "A very long ASCII string.", count: n/50)
func buildWorkload() {
blackHole(strings)
blackHole(ints)
blackHole(str)
}
@inline(never)
func run_RemoveWhereQuadraticStrings(_ scale: Int) {
for _ in 0..<scale {
var workload = strings; workload.swapAt(0,1)
testQuadratic(workload: &workload)
}
}
@inline(never)
func run_RemoveWhereQuadraticInts(_ scale: Int) {
for _ in 0..<scale {
var workload = ints; workload.swapAt(0,1)
testQuadratic(workload: &workload)
}
}
@inline(never)
func run_RemoveWhereFilterStrings(_ scale: Int) {
for _ in 0..<scale {
var workload = strings; workload.swapAt(0,1)
testFilter(workload: &workload)
}
}
@inline(never)
func run_RemoveWhereFilterInts(_ scale: Int) {
for _ in 0..<scale {
var workload = ints; workload.swapAt(0,1)
testFilter(workload: &workload)
}
}
@inline(never)
func run_RemoveWhereMoveStrings(_ scale: Int) {
for _ in 0..<scale {
var workload = strings; workload.swapAt(0,1)
testMove(workload: &workload)
}
}
@inline(never)
func run_RemoveWhereMoveInts(_ scale: Int) {
for _ in 0..<scale {
var workload = ints; workload.swapAt(0,1)
testMove(workload: &workload)
}
}
@inline(never)
func run_RemoveWhereSwapStrings(_ scale: Int) {
for _ in 0..<scale {
var workload = strings; workload.swapAt(0,1)
testSwap(workload: &workload)
}
}
@inline(never)
func run_RemoveWhereSwapInts(_ scale: Int) {
for _ in 0..<scale {
var workload = ints; workload.swapAt(0,1)
testSwap(workload: &workload)
}
}
@inline(never)
func run_RemoveWhereFilterString(_ scale: Int) {
for _ in 0..<scale {
var workload = str
workload.append("!")
testFilter(workload: &workload)
}
}
@inline(never)
func run_RemoveWhereQuadraticString(_ scale: Int) {
for _ in 0..<scale {
var workload = str
workload.append("!")
testQuadratic(workload: &workload)
}
}
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