DO NOT SUBMIT [swift2objc] benchmarking baseline for foundation caching

pkgs/swift2objc/lib/src/foundation_cache/Foundation@Darwin.symbols.json

@@ -0,0 +1 @@
+{"metadata":{"formatVersion":{"major":0,"minor":6,"patch":0},"generator":"Apple Swift version 6.2.1 (swiftlang-6.2.1.4.8 clang-1700.4.4.1)"},"module":{"name":"Foundation","platform":{"architecture":"arm64e","vendor":"apple","operatingSystem":{"name":"macosx","minimumVersion":{"major":26,"minor":1}}}},"symbols":[{"kind":{"identifier":"swift.func.op","displayName":"Operator"},"identifier":{"precise":"s:10Foundation18_ErrorCodeProtocolPAAE2teoiySbx_s0B0_ptFZ::SYNTHESIZED::c:@M@Darwin@E@MachErrorCode","interfaceLanguage":"swift"},"pathComponents":["MachErrorCode","~=(_:_:)"],"names":{"title":"~=(_:_:)","subHeading":[{"kind":"keyword","spelling":"static"},{"kind":"text","spelling":" "},{"kind":"keyword","spelling":"func"},{"kind":"text","spelling":" "},{"kind":"identifier","spelling":"~="},{"kind":"text","spelling":" "},{"kind":"text","spelling":"("},{"kind":"typeIdentifier","spelling":"Self"},{"kind":"text","spelling":", any "},{"kind":"typeIdentifier","spelling":"Error","preciseIdentifier":"s:s5ErrorP"},{"kind":"text","spelling":") -> "},{"kind":"typeIdentifier","spelling":"Bool","preciseIdentifier":"s:Sb"}]},"docComment":{"module":"Foundation","lines":[{"text":"Allow one to match an error code against an arbitrary error."}]},"functionSignature":{"parameters":[{"name":"match","declarationFragments":[{"kind":"identifier","spelling":"match"},{"kind":"text","spelling":": "},{"kind":"typeIdentifier","spelling":"Self"}]},{"name":"error","declarationFragments":[{"kind":"identifier","spelling":"error"},{"kind":"text","spelling":": any "},{"kind":"typeIdentifier","spelling":"Error","preciseIdentifier":"s:s5ErrorP"}]}],"returns":[{"kind":"typeIdentifier","spelling":"Bool","preciseIdentifier":"s:Sb"}]},"swiftExtension":{"extendedModule":"Foundation","typeKind":"swift.protocol"},"declarationFragments":[{"kind":"keyword","spelling":"static"},{"kind":"text","spelling":" "},{"kind":"keyword","spelling":"func"},{"kind":"text","spelling":" "},{"kind":"identifier","spelling":"~="},{"kind":"text","spelling":" "},{"kind":"text","spelling":"("},{"kind":"internalParam","spelling":"match"},{"kind":"text","spelling":": "},{"kind":"typeIdentifier","spelling":"Self"},{"kind":"text","spelling":", "},{"kind":"internalParam","spelling":"error"},{"kind":"text","spelling":": any "},{"kind":"typeIdentifier","spelling":"Error","preciseIdentifier":"s:s5ErrorP"},{"kind":"text","spelling":") -> "},{"kind":"typeIdentifier","spelling":"Bool","preciseIdentifier":"s:Sb"}],"accessLevel":"public","availability":[{"domain":"macOS","introduced":{"major":10,"minor":10}},{"domain":"watchOS","introduced":{"major":2,"minor":0}},{"domain":"iOS","introduced":{"major":8,"minor":0}},{"domain":"tvOS","introduced":{"major":9,"minor":0}}]}],"relationships":[{"kind":"conformsTo","source":"c:@M@Darwin@E@MachErrorCode","target":"s:s8CopyableP","targetFallback":"Swift.Copyable"},{"kind":"conformsTo","source":"c:@M@Darwin@E@MachErrorCode","target":"s:SQ","targetFallback":"Swift.Equatable"},{"kind":"memberOf","source":"s:10Foundation18_ErrorCodeProtocolPAAE2teoiySbx_s0B0_ptFZ::SYNTHESIZED::c:@M@Darwin@E@MachErrorCode","target":"c:@M@Darwin@E@MachErrorCode","targetFallback":"Darwin.MachErrorCode"}]}

pkgs/swift2objc/lib/src/foundation_cache/Foundation@System.symbols.json

@@ -0,0 +1 @@
+{"metadata":{"formatVersion":{"major":0,"minor":6,"patch":0},"generator":"Apple Swift version 6.2.1 (swiftlang-6.2.1.4.8 clang-1700.4.4.1)"},"module":{"name":"Foundation","platform":{"architecture":"arm64e","vendor":"apple","operatingSystem":{"name":"macosx","minimumVersion":{"major":26,"minor":1}}}},"symbols":[{"kind":{"identifier":"swift.init","displayName":"Initializer"},"identifier":{"precise":"s:6System8FilePathV10FoundationEyACSgAD3URLVcfc","interfaceLanguage":"swift"},"pathComponents":["FilePath","init(_:)"],"names":{"title":"init(_:)","subHeading":[{"kind":"keyword","spelling":"init"},{"kind":"text","spelling":"?("},{"kind":"typeIdentifier","spelling":"URL","preciseIdentifier":"s:10Foundation3URLV"},{"kind":"text","spelling":")"}]},"docComment":{"module":"Foundation","lines":[{"text":"Creates a file path from a URL"},{"text":""},{"text":"The result is nil if `url` doesn't refer to a local file."}]},"functionSignature":{"parameters":[{"name":"url","declarationFragments":[{"kind":"identifier","spelling":"url"},{"kind":"text","spelling":": "},{"kind":"typeIdentifier","spelling":"URL","preciseIdentifier":"s:10Foundation3URLV"}]}]},"swiftExtension":{"extendedModule":"System","typeKind":"swift.struct"},"declarationFragments":[{"kind":"keyword","spelling":"init"},{"kind":"text","spelling":"?("},{"kind":"externalParam","spelling":"_"},{"kind":"text","spelling":" "},{"kind":"internalParam","spelling":"url"},{"kind":"text","spelling":": "},{"kind":"typeIdentifier","spelling":"URL","preciseIdentifier":"s:10Foundation3URLV"},{"kind":"text","spelling":")"}],"accessLevel":"public","availability":[{"domain":"macOS","introduced":{"major":11,"minor":0}},{"domain":"watchOS","introduced":{"major":7,"minor":0}},{"domain":"iOS","introduced":{"major":14,"minor":0}},{"domain":"tvOS","introduced":{"major":14,"minor":0}}]}],"relationships":[{"kind":"memberOf","source":"s:6System8FilePathV10FoundationEyACSgAD3URLVcfc","target":"s:6System8FilePathV","targetFallback":"System.FilePath"}]}

pkgs/swift2objc/lib/src/foundation_cache/Foundation@_Concurrency.symbols.json

@@ -0,0 +1 @@
+{"metadata":{"formatVersion":{"major":0,"minor":6,"patch":0},"generator":"Apple Swift version 6.2.1 (swiftlang-6.2.1.4.8 clang-1700.4.4.1)"},"module":{"name":"Foundation","platform":{"architecture":"arm64e","vendor":"apple","operatingSystem":{"name":"macosx","minimumVersion":{"major":26,"minor":1}}}},"symbols":[{"kind":{"identifier":"swift.property","displayName":"Instance Property"},"identifier":{"precise":"s:Sci10Foundations5UInt8V7ElementRtzrlE5linesAA17AsyncLineSequenceVyxGvp","interfaceLanguage":"swift"},"pathComponents":["AsyncSequence","lines"],"names":{"title":"lines","subHeading":[{"kind":"keyword","spelling":"var"},{"kind":"text","spelling":" "},{"kind":"identifier","spelling":"lines"},{"kind":"text","spelling":": "},{"kind":"typeIdentifier","spelling":"AsyncLineSequence","preciseIdentifier":"s:10Foundation17AsyncLineSequenceV"},{"kind":"text","spelling":"<"},{"kind":"typeIdentifier","spelling":"Self"},{"kind":"text","spelling":">"}]},"docComment":{"module":"Foundation","lines":[{"text":"A non-blocking sequence of newline-separated `Strings` created by decoding the elements of `self` as UTF8."},{"text":""}]},"swiftExtension":{"extendedModule":"_Concurrency","typeKind":"swift.protocol","constraints":[{"kind":"sameType","lhs":"Self.Element","rhs":"UInt8","rhsPrecise":"s:s5UInt8V"}]},"declarationFragments":[{"kind":"keyword","spelling":"var"},{"kind":"text","spelling":" "},{"kind":"identifier","spelling":"lines"},{"kind":"text","spelling":": "},{"kind":"typeIdentifier","spelling":"AsyncLineSequence","preciseIdentifier":"s:10Foundation17AsyncLineSequenceV"},{"kind":"text","spelling":"<"},{"kind":"typeIdentifier","spelling":"Self"},{"kind":"text","spelling":"> { "},{"kind":"keyword","spelling":"get"},{"kind":"text","spelling":" }"}],"accessLevel":"public","availability":[{"domain":"macOS","introduced":{"major":12,"minor":0}},{"domain":"watchOS","introduced":{"major":8,"minor":0}},{"domain":"iOS","introduced":{"major":15,"minor":0}},{"domain":"tvOS","introduced":{"major":15,"minor":0}}]},{"kind":{"identifier":"swift.property","displayName":"Instance Property"},"identifier":{"precise":"s:Sci10Foundations5UInt8V7ElementRtzrlE10charactersAA22AsyncCharacterSequenceVyxGvp","interfaceLanguage":"swift"},"pathComponents":["AsyncSequence","characters"],"names":{"title":"characters","subHeading":[{"kind":"keyword","spelling":"var"},{"kind":"text","spelling":" "},{"kind":"identifier","spelling":"characters"},{"kind":"text","spelling":": "},{"kind":"typeIdentifier","spelling":"AsyncCharacterSequence","preciseIdentifier":"s:10Foundation22AsyncCharacterSequenceV"},{"kind":"text","spelling":"<"},{"kind":"typeIdentifier","spelling":"Self"},{"kind":"text","spelling":">"}]},"docComment":{"module":"Foundation","lines":[{"text":"A non-blocking sequence of `Characters` created by decoding the elements of `self` as UTF8."},{"text":""}]},"swiftExtension":{"extendedModule":"_Concurrency","typeKind":"swift.protocol","constraints":[{"kind":"sameType","lhs":"Self.Element","rhs":"UInt8","rhsPrecise":"s:s5UInt8V"}]},"declarationFragments":[{"kind":"keyword","spelling":"var"},{"kind":"text","spelling":" "},{"kind":"identifier","spelling":"characters"},{"kind":"text","spelling":": "},{"kind":"typeIdentifier","spelling":"AsyncCharacterSequence","preciseIdentifier":"s:10Foundation22AsyncCharacterSequenceV"},{"kind":"text","spelling":"<"},{"kind":"typeIdentifier","spelling":"Self"},{"kind":"text","spelling":"> { "},{"kind":"keyword","spelling":"get"},{"kind":"text","spelling":" }"}],"accessLevel":"public","availability":[{"domain":"macOS","introduced":{"major":12,"minor":0}},{"domain":"watchOS","introduced":{"major":8,"minor":0}},{"domain":"iOS","introduced":{"major":15,"minor":0}},{"domain":"tvOS","introduced":{"major":15,"minor":0}}]},{"kind":{"identifier":"swift.property","displayName":"Instance Property"},"identifier":{"precise":"s:Sci10Foundations5UInt8V7ElementRtzrlE14unicodeScalarsAA26AsyncUnicodeScalarSequenceVyxGvp","interfaceLanguage":"swift"},"pathComponents":["AsyncSequence","unicodeScalars"],"names":{"title":"unicodeScalars","subHeading":[{"kind":"keyword","spelling":"var"},{"kind":"text","spelling":" "},{"kind":"identifier","spelling":"unicodeScalars"},{"kind":"text","spelling":": "},{"kind":"typeIdentifier","spelling":"AsyncUnicodeScalarSequence","preciseIdentifier":"s:10Foundation26AsyncUnicodeScalarSequenceV"},{"kind":"text","spelling":"<"},{"kind":"typeIdentifier","spelling":"Self"},{"kind":"text","spelling":">"}]},"docComment":{"module":"Foundation","lines":[{"text":"A non-blocking sequence of `UnicodeScalars` created by decoding the elements of `self` as UTF8."},{"text":""}]},"swiftExtension":{"extendedModule":"_Concurrency","typeKind":"swift.protocol","constraints":[{"kind":"sameType","lhs":"Self.Element","rhs":"UInt8","rhsPrecise":"s:s5UInt8V"}]},"declarationFragments":[{"kind":"keyword","spelling":"var"},{"kind":"text","spelling":" "},{"kind":"identifier","spelling":"unicodeScalars"},{"kind":"text","spelling":": "},{"kind":"typeIdentifier","spelling":"AsyncUnicodeScalarSequence","preciseIdentifier":"s:10Foundation26AsyncUnicodeScalarSequenceV"},{"kind":"text","spelling":"<"},{"kind":"typeIdentifier","spelling":"Self"},{"kind":"text","spelling":"> { "},{"kind":"keyword","spelling":"get"},{"kind":"text","spelling":" }"}],"accessLevel":"public","availability":[{"domain":"macOS","introduced":{"major":12,"minor":0}},{"domain":"watchOS","introduced":{"major":8,"minor":0}},{"domain":"iOS","introduced":{"major":15,"minor":0}},{"domain":"tvOS","introduced":{"major":15,"minor":0}}]}],"relationships":[{"kind":"memberOf","source":"s:Sci10Foundations5UInt8V7ElementRtzrlE5linesAA17AsyncLineSequenceVyxGvp","target":"s:Sci","targetFallback":"_Concurrency.AsyncSequence"},{"kind":"memberOf","source":"s:Sci10Foundations5UInt8V7ElementRtzrlE10charactersAA22AsyncCharacterSequenceVyxGvp","target":"s:Sci","targetFallback":"_Concurrency.AsyncSequence"},{"kind":"memberOf","source":"s:Sci10Foundations5UInt8V7ElementRtzrlE14unicodeScalarsAA26AsyncUnicodeScalarSequenceVyxGvp","target":"s:Sci","targetFallback":"_Concurrency.AsyncSequence"}]}

pkgs/swift2objc/lib/src/foundation_cache/Foundation@_DarwinFoundation1.symbols.json

@@ -0,0 +1 @@
+{"metadata":{"formatVersion":{"major":0,"minor":6,"patch":0},"generator":"Apple Swift version 6.2.1 (swiftlang-6.2.1.4.8 clang-1700.4.4.1)"},"module":{"name":"Foundation","platform":{"architecture":"arm64e","vendor":"apple","operatingSystem":{"name":"macosx","minimumVersion":{"major":26,"minor":1}}}},"symbols":[{"kind":{"identifier":"swift.func.op","displayName":"Operator"},"identifier":{"precise":"s:10Foundation18_ErrorCodeProtocolPAAE2teoiySbx_s0B0_ptFZ::SYNTHESIZED::c:@M@_DarwinFoundation1@E@POSIXErrorCode","interfaceLanguage":"swift"},"pathComponents":["POSIXErrorCode","~=(_:_:)"],"names":{"title":"~=(_:_:)","subHeading":[{"kind":"keyword","spelling":"static"},{"kind":"text","spelling":" "},{"kind":"keyword","spelling":"func"},{"kind":"text","spelling":" "},{"kind":"identifier","spelling":"~="},{"kind":"text","spelling":" "},{"kind":"text","spelling":"("},{"kind":"typeIdentifier","spelling":"Self"},{"kind":"text","spelling":", any "},{"kind":"typeIdentifier","spelling":"Error","preciseIdentifier":"s:s5ErrorP"},{"kind":"text","spelling":") -> "},{"kind":"typeIdentifier","spelling":"Bool","preciseIdentifier":"s:Sb"}]},"docComment":{"module":"Foundation","lines":[{"text":"Allow one to match an error code against an arbitrary error."}]},"functionSignature":{"parameters":[{"name":"match","declarationFragments":[{"kind":"identifier","spelling":"match"},{"kind":"text","spelling":": "},{"kind":"typeIdentifier","spelling":"Self"}]},{"name":"error","declarationFragments":[{"kind":"identifier","spelling":"error"},{"kind":"text","spelling":": any "},{"kind":"typeIdentifier","spelling":"Error","preciseIdentifier":"s:s5ErrorP"}]}],"returns":[{"kind":"typeIdentifier","spelling":"Bool","preciseIdentifier":"s:Sb"}]},"swiftExtension":{"extendedModule":"Foundation","typeKind":"swift.protocol"},"declarationFragments":[{"kind":"keyword","spelling":"static"},{"kind":"text","spelling":" "},{"kind":"keyword","spelling":"func"},{"kind":"text","spelling":" "},{"kind":"identifier","spelling":"~="},{"kind":"text","spelling":" "},{"kind":"text","spelling":"("},{"kind":"internalParam","spelling":"match"},{"kind":"text","spelling":": "},{"kind":"typeIdentifier","spelling":"Self"},{"kind":"text","spelling":", "},{"kind":"internalParam","spelling":"error"},{"kind":"text","spelling":": any "},{"kind":"typeIdentifier","spelling":"Error","preciseIdentifier":"s:s5ErrorP"},{"kind":"text","spelling":") -> "},{"kind":"typeIdentifier","spelling":"Bool","preciseIdentifier":"s:Sb"}],"accessLevel":"public","availability":[{"domain":"macOS","introduced":{"major":10,"minor":10}},{"domain":"watchOS","introduced":{"major":2,"minor":0}},{"domain":"iOS","introduced":{"major":8,"minor":0}},{"domain":"tvOS","introduced":{"major":9,"minor":0}}]}],"relationships":[{"kind":"conformsTo","source":"c:@M@_DarwinFoundation1@E@POSIXErrorCode","target":"s:s8CopyableP","targetFallback":"Swift.Copyable"},{"kind":"conformsTo","source":"c:@M@_DarwinFoundation1@E@POSIXErrorCode","target":"s:SQ","targetFallback":"Swift.Equatable"},{"kind":"memberOf","source":"s:10Foundation18_ErrorCodeProtocolPAAE2teoiySbx_s0B0_ptFZ::SYNTHESIZED::c:@M@_DarwinFoundation1@E@POSIXErrorCode","target":"c:@M@_DarwinFoundation1@E@POSIXErrorCode","targetFallback":"_DarwinFoundation1.POSIXErrorCode"}]}

pkgs/swift2objc/lib/src/generate_wrapper.dart

@@ -13,6 +13,7 @@ import 'generator/generator.dart';
 import 'parser/parser.dart';
 import 'transformer/transform.dart';
 import 'utils.dart';
+import 'utils/perf_timer.dart';
 
 extension Swift2ObjCGeneratorMethod on Swift2ObjCGenerator {
   /// Used to generate the wrapper swift file.
@@ -26,6 +27,8 @@ Future<void> _generateWrapper(
   Swift2ObjCGenerator config,
   Context context,
 ) async {
+  final scope = PerfScope('swift2objc generation', logger: context.logger);
+
   final Directory tempDir;
   final bool deleteTempDirWhenDone;
 
@@ -48,15 +51,20 @@ Future<void> _generateWrapper(
 
   final allInputConfigs = [...config.inputs, builtInInputConfig];
 
+  // Parse symbolgraph (baseline: no caching)
+  final parseScope = scope.child('parse symbolgraph');
   for (final input in allInputConfigs) {
+    // Always generate symbolgraph JSON (baseline measurement)
     if (input is HasSymbolgraphCommand) {
+      final extractTimer = scope.child('symbolgraph extraction');
       await _generateSymbolgraphJson(
         (input as HasSymbolgraphCommand).symbolgraphCommand(
           await target(),
           path.absolute((await sdkPath()).path),
         ),
         tempDir,
       );
+      extractTimer.close();
     }
 
     final symbolgraphFileName = switch (input) {
@@ -65,33 +73,53 @@ Future<void> _generateWrapper(
       JsonFileInputConfig() => path.absolute(input.jsonFile.path),
     };
     final symbolgraphJsonPath = path.join(tempDir.path, symbolgraphFileName);
+
+    final parseTimer = scope.child('json parse');
     final symbolgraphJson = readJsonFile(symbolgraphJsonPath);
+    parseTimer.close();
 
     sourceModules.add(switch (input) {
       FilesInputConfig() => null,
       ModuleInputConfig() => input.module,
       JsonFileInputConfig() => parseModuleName(symbolgraphJson),
     });
+
+    final mergeTimer = scope.child('symbolgraph merge');
     mergedSymbolgraph.merge(parseSymbolgraph(input, symbolgraphJson));
+    mergeTimer.close();
   }
+  parseScope.close();
 
+  // Parse declarations
+  final declScope = scope.child('parse declarations');
   final declarations = parseDeclarations(context, mergedSymbolgraph);
+  declScope.close();
+
+  // Transform declarations
+  final transformScope = scope.child('transform');
   final transformedDeclarations = transform(
     context,
     declarations,
     filter: config.include,
   );
+  transformScope.close();
+
+  // Generate code
+  final genScope = scope.child('generate');
   final wrapperCode = generate(
     transformedDeclarations,
     importedModuleNames: sourceModules.nonNulls.toList(),
     preamble: config.preamble,
   );
+  genScope.close();
 
   File.fromUri(config.outputFile).writeAsStringSync(wrapperCode);
 
   if (deleteTempDirWhenDone) {
     tempDir.deleteSync(recursive: true);
   }
+
+  scope.close();
 }
 
 Future<void> _generateSymbolgraphJson(