[benchmark] Add benchmarks for IndexPath's subscripts, max, min

benchmark/CMakeLists.txt

@@ -98,6 +98,7 @@ set(SWIFT_BENCH_MODULES
     single-source/Hash
     single-source/Histogram
     single-source/HTTP2StateMachine
+    single-source/IndexPathTest
     single-source/InsertCharacter
     single-source/IntegerParsing
     single-source/Integrate

benchmark/single-source/IndexPathTest.swift

@@ -0,0 +1,163 @@
+//===--- IndexPathTest.swift ----------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2020 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
+import Foundation
+
+let size = 200
+let tags: [BenchmarkCategory] = [.validation, .api, .IndexPath]
+
+public let IndexPathTest = [
+  BenchmarkInfo(name: "IndexPathSubscriptMutation", 
+  runFunction: { n in run_IndexPathSubscriptMutation(n * 1000, size)}, 
+  tags: tags),
+  BenchmarkInfo(name: "IndexPathSubscriptRangeMutation", 
+  runFunction: { n in run_IndexPathSubscriptRangeMutation(n * 1000, size)}, 
+  tags: tags),
+
+  BenchmarkInfo(name: "IndexPathMaxBeginning", 
+  runFunction: { n in run_IndexPathMaxBeginning(n * 1000)}, 
+  tags: tags),
+  BenchmarkInfo(name: "IndexPathMaxMiddle", 
+  runFunction: { n in run_IndexPathMaxMiddle(n * 1000)}, 
+  tags: tags),
+  BenchmarkInfo(name: "IndexPathMaxEnd", 
+  runFunction: { n in run_IndexPathMaxEnd(n * 1000)}, 
+  tags: tags),
+
+  BenchmarkInfo(name: "IndexPathMinBeginning", 
+  runFunction: { n in run_IndexPathMinBeginning(n * 1000)}, 
+  tags: tags),
+  BenchmarkInfo(name: "IndexPathMinMiddle", 
+  runFunction: { n in run_IndexPathMinMiddle(n * 1000)}, 
+  tags: tags),
+  BenchmarkInfo(name: "IndexPathMinEnd", 
+  runFunction: { n in run_IndexPathMinEnd(n * 1000)}, 
+  tags: tags),
+]
+
+@inline(__always)
+func indexPath(_ size: Int, reversed: Bool = false) -> IndexPath {
+    let indexes = Array(0..<size)
+    return IndexPath(indexes: reversed ? indexes.reversed() : indexes)
+}
+
+@inline(__always)
+func indexPath(_ size: Int, middle: Int) -> IndexPath {
+    var indexes = Array(0..<size)
+    indexes.insert(middle, at: (indexes.count - 1) / 2)
+    return IndexPath(indexes: indexes)
+}
+
+// Subscript Mutations
+
+@inline(__always)
+func subscriptMutation(
+  n: Int,
+  mutations: Int,
+  mutate: (inout IndexPath, Int) -> ()) {
+    for _ in 0..<n {
+      var ip = indexPath(size)
+
+      for i in 0..<mutations {
+        mutate(&ip, i)
+      }
+
+      blackHole(ip)
+    }
+}
+
+@inline(never)
+public func run_IndexPathSubscriptMutation(_ n: Int, _ count: Int) {
+  subscriptMutation(n: n,  mutations: count, mutate: { ip, i in
+		ip[i % 4] += 1
+  })
+}
+
+@inline(never)
+public func run_IndexPathSubscriptRangeMutation(_ n: Int, _ count: Int) {
+  subscriptMutation(n: count, mutations: count, mutate: { ip, i in
+		ip[0..<i] += [i]
+  })
+}
+
+// Max, Min
+
+@inline(__always)
+func maxMin(
+  n: Int, 
+  creator: () -> IndexPath, 
+  maxMinFunc: (inout IndexPath) -> Int?) {
+    for _ in 0..<n {
+      var ip = creator()
+      let found = maxMinFunc(&ip) != nil
+      blackHole(found)
+    }
+}
+
+// Max
+
+@inline(never)
+public func run_IndexPathMaxBeginning(_ n: Int) {
+  maxMin(n: n, creator: {
+    indexPath(size, reversed: true)
+  }, maxMinFunc: { ip in
+    ip.max()
+  })
+}
+
+@inline(never)
+public func run_IndexPathMaxMiddle(_ n: Int) {
+  maxMin(n: n, creator: {
+    indexPath(size, middle: size + 1)
+  }, maxMinFunc: { ip in
+    ip.max()
+  })
+}
+
+@inline(never)
+public func run_IndexPathMaxEnd(_ n: Int) {
+  maxMin(n: n, creator: {
+    indexPath(size)
+  }, maxMinFunc: { ip in
+    ip.max()
+  })
+}
+
+// Min
+
+@inline(never)
+public func run_IndexPathMinBeginning(_ n: Int) {
+  maxMin(n: n, creator: {
+   indexPath(size)
+  }, maxMinFunc: { ip in
+    ip.min()
+  })
+}
+
+@inline(never)
+public func run_IndexPathMinMiddle(_ n: Int) {
+  maxMin(n: n, creator: {
+    indexPath(size, middle: -1)
+  }, maxMinFunc: { ip in
+    ip.min()
+  })
+}
+
+@inline(never)
+public func run_IndexPathMinEnd(_ n: Int) {
+  maxMin(n: n, creator: {
+    indexPath(size, reversed: true)
+  }, maxMinFunc: { ip in
+    ip.min()
+  })
+}

benchmark/utils/TestsUtils.swift

@@ -23,7 +23,7 @@ public enum BenchmarkCategory : String {
   // we know is important to measure.
   case validation
   // subsystems to validate and their subcategories.
-  case api, Array, String, Dictionary, Codable, Set, Data
+  case api, Array, String, Dictionary, Codable, Set, Data, IndexPath
   case sdk
   case runtime, refcount, metadata
   // Other general areas of compiled code validation.

benchmark/utils/main.swift

@@ -86,6 +86,7 @@ import Hanoi
 import Hash
 import Histogram
 import HTTP2StateMachine
+import IndexPathTest
 import InsertCharacter
 import IntegerParsing
 import Integrate
@@ -274,6 +275,7 @@ registerBenchmark(Hanoi)
 registerBenchmark(HashTest)
 registerBenchmark(Histogram)
 registerBenchmark(HTTP2StateMachine)
+registerBenchmark(IndexPathTest)
 registerBenchmark(InsertCharacter)
 registerBenchmark(IntegerParsing)
 registerBenchmark(IntegrateTest)