Update swift/main

Sources/RegexBenchmark/Benchmark.swift

@@ -71,6 +71,13 @@ struct NSBenchmark: RegexBenchmark {
   enum NSMatchType {
     case allMatches
     case first
+
+    init(_ type: Benchmark.MatchType) {
+      switch type {
+      case .whole, .first: self = .first
+      case .allMatches: self = .allMatches
+      }
+    }
   }
 
   func run() {
@@ -126,7 +133,7 @@ struct CrossBenchmark {
   /// The base name of the benchmark
   var baseName: String
 
-  /// The string to compile in differnet engines
+  /// The string to compile in different engines
   var regex: String
 
   /// The text to search
@@ -143,57 +150,32 @@ struct CrossBenchmark {
   /// Whether or not to do firstMatch as well or just allMatches
   var includeFirst: Bool = false
 
+  /// Whether to also run scalar-semantic mode
+  var alsoRunScalarSemantic: Bool = true
+
   func register(_ runner: inout BenchmarkRunner) {
-    let swiftRegex = try! Regex(regex)
-    let nsRegex: NSRegularExpression
     if isWhole {
-      nsRegex = try! NSRegularExpression(pattern: "^" + regex + "$")
+      runner.registerCrossBenchmark(
+        nameBase: baseName,
+        input: input,
+        pattern: regex,
+        .whole,
+        alsoRunScalarSemantic: alsoRunScalarSemantic)
     } else {
-      nsRegex = try! NSRegularExpression(pattern: regex)
-    }
+      runner.registerCrossBenchmark(
+        nameBase: baseName,
+        input: input,
+        pattern: regex,
+        .allMatches,
+        alsoRunScalarSemantic: alsoRunScalarSemantic)
 
-    if isWhole {
-      runner.register(
-        Benchmark(
-          name: baseName + "Whole",
-          regex: swiftRegex,
-          pattern: regex,
-          type: .whole,
-          target: input))
-      runner.register(
-        NSBenchmark(
-          name: baseName + "Whole" + CrossBenchmark.nsSuffix,
-          regex: nsRegex,
-          type: .first,
-          target: input))
-    } else {
-      runner.register(
-        Benchmark(
-          name: baseName + "All",
-          regex: swiftRegex,
-          pattern: regex,
-          type: .allMatches,
-          target: input))
-      runner.register(
-        NSBenchmark(
-          name: baseName + "All" + CrossBenchmark.nsSuffix,
-          regex: nsRegex,
-          type: .allMatches,
-          target: input))
       if includeFirst || runner.includeFirstOverride {
-        runner.register(
-          Benchmark(
-            name: baseName + "First",
-            regex: swiftRegex,
-            pattern: regex,
-            type: .first,
-            target: input))
-        runner.register(
-          NSBenchmark(
-            name: baseName + "First" + CrossBenchmark.nsSuffix,
-            regex: nsRegex,
-            type: .first,
-            target: input))
+        runner.registerCrossBenchmark(
+          nameBase: baseName,
+          input: input,
+          pattern: regex,
+          .first,
+          alsoRunScalarSemantic: alsoRunScalarSemantic)
       }
     }
   }
@@ -209,20 +191,16 @@ struct CrossInputListBenchmark {
 
   /// The list of strings to search
   var inputs: [String]
+
+  /// Also run in scalar-semantic mode
+  var alsoRunScalarSemantic: Bool = true
 
   func register(_ runner: inout BenchmarkRunner) {
-    let swiftRegex = try! Regex(regex)
-    runner.register(InputListBenchmark(
+    runner.registerCrossBenchmark(
       name: baseName,
-      regex: swiftRegex,
+      inputList: inputs,
       pattern: regex,
-      targets: inputs
-    ))
-    runner.register(InputListNSBenchmark(
-      name: baseName + CrossBenchmark.nsSuffix,
-      regex: regex,
-      targets: inputs
-    ))
+      alsoRunScalarSemantic: alsoRunScalarSemantic)
   }
 }
 

Sources/RegexBenchmark/BenchmarkRunner.swift

@@ -4,6 +4,16 @@ import Foundation
 /// The number of times to re-run the benchmark if results are too varying
 private var rerunCount: Int { 3 }
 
+extension Benchmark.MatchType {
+  fileprivate var nameSuffix: String {
+    switch self {
+    case .whole: return "_Whole"
+    case .first: return "_First"
+    case .allMatches: return "_All"
+    }
+  }
+}
+
 struct BenchmarkRunner {
   let suiteName: String
   var suite: [any RegexBenchmark] = []
@@ -16,12 +26,141 @@ struct BenchmarkRunner {
 
   // Forcibly include firstMatch benchmarks for all CrossBenchmarks
   let includeFirstOverride: Bool
+
+  // Register a cross-benchmark
+  mutating func registerCrossBenchmark(
+    nameBase: String,
+    input: String,
+    pattern: String,
+    _ type: Benchmark.MatchType,
+    alsoRunScalarSemantic: Bool = true
+  ) {
+    let swiftRegex = try! Regex(pattern)
+    let nsRegex: NSRegularExpression
+    if type == .whole {
+      nsRegex = try! NSRegularExpression(pattern: "^" + pattern + "$")
+    } else {
+      nsRegex = try! NSRegularExpression(pattern: pattern)
+    }
+    let nameSuffix = type.nameSuffix
+
+    register(
+      Benchmark(
+        name: nameBase + nameSuffix,
+        regex: swiftRegex,
+        pattern: pattern,
+        type: type,
+        target: input))
+    register(
+      NSBenchmark(
+        name: nameBase + nameSuffix + CrossBenchmark.nsSuffix,
+        regex: nsRegex,
+        type: .init(type),
+        target: input))
+
+    if alsoRunScalarSemantic {
+      register(
+        Benchmark(
+          name: nameBase + nameSuffix + "_Scalar",
+          regex: swiftRegex.matchingSemantics(.unicodeScalar),
+          pattern: pattern,
+          type: type,
+          target: input))
+      register(
+        NSBenchmark(
+          name: nameBase + nameSuffix + "_Scalar" + CrossBenchmark.nsSuffix,
+          regex: nsRegex,
+          type: .init(type),
+          target: input))
+    }
+  }
+
+  // Register a cross-benchmark list
+  mutating func registerCrossBenchmark(
+    name: String,
+    inputList: [String],
+    pattern: String,
+    alsoRunScalarSemantic: Bool = true
+  ) {
+    let swiftRegex = try! Regex(pattern)
+    register(InputListBenchmark(
+      name: name,
+      regex: swiftRegex,
+      pattern: pattern,
+      targets: inputList
+    ))
+    register(InputListNSBenchmark(
+      name: name + CrossBenchmark.nsSuffix,
+      regex: pattern,
+      targets: inputList
+    ))
+
+    if alsoRunScalarSemantic {
+      register(InputListBenchmark(
+        name: name + "_Scalar",
+        regex: swiftRegex.matchingSemantics(.unicodeScalar),
+        pattern: pattern,
+        targets: inputList
+      ))
+      register(InputListNSBenchmark(
+        name: name + "_Scalar" + CrossBenchmark.nsSuffix,
+        regex: pattern,
+        targets: inputList
+      ))
+    }
+
+  }
+
+  // Register a swift-only benchmark
+  mutating func register(
+    nameBase: String,
+    input: String,
+    pattern: String,
+    _ swiftRegex: Regex<AnyRegexOutput>,
+    _ type: Benchmark.MatchType,
+    alsoRunScalarSemantic: Bool = true
+  ) {
+    let nameSuffix = type.nameSuffix
+
+    register(
+      Benchmark(
+        name: nameBase + nameSuffix,
+        regex: swiftRegex,
+        pattern: pattern,
+        type: type,
+        target: input))
+
+    if alsoRunScalarSemantic {
+      register(
+        Benchmark(
+          name: nameBase + nameSuffix + "_Scalar",
+          regex: swiftRegex,
+          pattern: pattern,
+          type: type,
+          target: input))
+    }
+  }
 
-  mutating func register(_ benchmark: some RegexBenchmark) {
+  private mutating func register(_ benchmark: NSBenchmark) {
     suite.append(benchmark)
   }
 
-  mutating func register(_ benchmark: some SwiftRegexBenchmark) {
+  private mutating func register(_ benchmark: Benchmark) {
+    var benchmark = benchmark
+    if enableTracing {
+      benchmark.enableTracing()
+    }
+    if enableMetrics {
+      benchmark.enableMetrics()
+    }
+    suite.append(benchmark)
+  }
+
+  private mutating func register(_ benchmark: InputListNSBenchmark) {
+    suite.append(benchmark)
+  }
+
+  private mutating func register(_ benchmark: InputListBenchmark) {
     var benchmark = benchmark
     if enableTracing {
       benchmark.enableTracing()

Sources/RegexBenchmark/Suite/CustomCharacterClasses.swift

@@ -12,53 +12,55 @@ extension BenchmarkRunner {
 
     let input = Inputs.graphemeBreakData
 
-    register(Benchmark(
-      name: "BasicCCC",
-      regex: try! Regex(basic),
+    // TODO: Which of these can be cross-benchmarks?
+
+    register(
+      nameBase: "BasicCCC",
+      input: input,
       pattern: basic,
-      type: .allMatches,
-      target: input))
+      try! Regex(basic),
+      .allMatches)
 
-    register(Benchmark(
-      name: "BasicRangeCCC",
-      regex: try! Regex(basicRange),
+    register(
+      nameBase: "BasicRangeCCC",
+      input: input,
       pattern: basicRange,
-      type: .allMatches,
-      target: input))
+      try! Regex(basicRange),
+      .allMatches)
 
-    register(Benchmark(
-      name: "CaseInsensitiveCCC",
-      regex: try! Regex(caseInsensitive),
+    register(
+      nameBase: "CaseInsensitiveCCC",
+      input: input,
       pattern: caseInsensitive,
-      type: .allMatches,
-      target: input))
+      try! Regex(caseInsensitive),
+      .allMatches)
 
-    register(Benchmark(
-      name: "InvertedCCC",
-      regex: try! Regex(inverted),
+    register(
+      nameBase: "InvertedCCC",
+      input: input,
       pattern: inverted,
-      type: .allMatches,
-      target: input))
+      try! Regex(inverted),
+      .allMatches)
 
-    register(Benchmark(
-      name: "SubtractionCCC",
-      regex: try! Regex(subtraction),
+    register(
+      nameBase: "SubtractionCCC",
+      input: input,
       pattern: subtraction,
-      type: .allMatches,
-      target: input))
+      try! Regex(subtraction),
+      .allMatches)
 
-    register(Benchmark(
-      name: "IntersectionCCC",
-      regex: try! Regex(intersection),
+    register(
+      nameBase: "IntersectionCCC",
+      input: input,
       pattern: intersection,
-      type: .allMatches,
-      target: input))
+      try! Regex(intersection),
+      .allMatches)
 
-    register(Benchmark(
-      name: "symDiffCCC",
-      regex: try! Regex(symmetricDifference),
+    register(
+      nameBase: "symDiffCCC",
+      input: input,
       pattern: symmetricDifference,
-      type: .allMatches,
-      target: input))
+      try! Regex(symmetricDifference),
+      .allMatches)
   }
 }

Sources/RegexBenchmark/Utils/Stats.swift

@@ -3,8 +3,8 @@ import Foundation
 enum Stats {}
 
 extension Stats {
-  // Maximum allowed standard deviation is 5% of the median runtime
-  static let maxAllowedStdev = 0.05
+  // Maximum allowed standard deviation is 7.5% of the median runtime
+  static let maxAllowedStdev = 0.075
 
   static func tTest(_ a: Measurement, _ b: Measurement) -> Bool {
     // Student's t-test