dart2js: Add script to test class-generation approaches for JS.

tools/dart2js/class_generator/class_generator.dart

Index: tools/dart2js/class_generator/class_generator.dart
diff --git a/tools/dart2js/class_generator/class_generator.dart b/tools/dart2js/class_generator/class_generator.dart
new file mode 100644
index 0000000000000000000000000000000000000000..59bf22e60ea029b58c43f332ca9280f33968046c
--- /dev/null
+++ b/tools/dart2js/class_generator/class_generator.dart
@@ -0,0 +1,785 @@
+// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Script that generates different approaches to initialize classes in
+// JavaScript.
+// Also benchmarks the approaches.
+
+import 'dart:io';
+import 'dart:async';
+
+class Config {
+  /// Number of classes that should be generated.
+  final int nbClasses;
+
+  /// Number of methods per class.
+  final int nbMethodsPerClass;
+
+  /// Should the JavaScript classes share a common super class?
+  ///
+  /// Currently unused for Dart, since it always has a common super class
+  /// anyways.
+  // TODO(floitsch): also create a common super class in Dart?
+  final bool shareCommonSuperclass;
+
+  /// Assign unique names to the methods or let them share the same one?
+  ///
+  /// Independent of this flag, the `callAll` and `instantiatePrevious` method
+  /// names are the same for all classes.
+  final bool sameMethodNames;
+
+  /// Adds a `print` statement to the method.
+  final bool shouldPrintInMethod;
+
+  /// Adds while loops to the method body.
+  ///
+  /// This has the effect that dart2js won't be able to inline the method and
+  /// controls the size of the method bodies.
+  final int nbWhileLoopsInBody;
+
+  /// Should the JavaScript output be wrapped into an anonymous function?
+  ///
+  /// When enabled wraps the program with the following pattern:
+  /// `(function() { <program> })()`.
+  final bool shouldWrapProgram;
+
+  /// Adds a `callAll` method that invokes all other methods of the class.
+  ///
+  /// This is necessary for dart2js to avoid tree-shaking.
+  /// Should probably always be on (except for presentations to demonstrate that
+  /// dart2js knows how to tree-shake).
+  ///
+  /// This method counts towards the [nbMethodsPerClass] limit.
+  final bool shouldEmitCallAllMethods;
+
+  /// Adds an `instantiatePrevious` method that instantiates the previous class.
+  ///
+  /// A "previous" class is the class that was generated before the current
+  /// class. The first class returns `null`.
+  final bool shouldEmitInstantiatePreviousMethod;
+
+  /// Makes sure that the dart2js tree-shaker doesn't remove classes.
+  ///
+  /// When set to `-1`, all classes are kept alive.
+  final int fakeInstantiateClass;
+
+  /// Defines the percent of classes that are dynamically instantiated.
+  final int instantiateClassesPercent;
+
+  Config({this.nbClasses, this.nbMethodsPerClass,
+          this.shareCommonSuperclass, this.sameMethodNames,
+          this.shouldPrintInMethod, this.nbWhileLoopsInBody,
+          this.shouldWrapProgram, this.shouldEmitCallAllMethods,
+          this.shouldEmitInstantiatePreviousMethod,
+          this.fakeInstantiateClass, this.instantiateClassesPercent});
+}
+
+String get d8Path {
+  Uri scriptPath = Platform.script;
+  String d8Executable = "../../../third_party/d8/";
+  if (Platform.isWindows) {
+    d8Executable += "windows/d8.exe";
+  } else if (Platform.isMacOS) {
+    d8Executable += "macos/d8";
+  } else if (Platform.isLinux) {
+    d8Executable += "linux/d8";
+  } else {
+    return null;
+  }
+  return scriptPath.resolve(d8Executable).path;
+}
+
+String get jsShellPath {
+  Uri scriptPath = Platform.script;
+  if (!Platform.isLinux) {
+    return null;
+  }
+  return scriptPath.resolve("../../../tools/testing/bin/jsshell").path;
+}
+
+String get dart2jsPath {
+  Uri scriptPath = Platform.script;
+  return scriptPath.resolve("../../../sdk/bin/dart2js").path;
+}
+
+abstract class ClassGenerator {
+  final StringBuffer buffer = new StringBuffer();
+  // By convention all methods should take one argument with this name.
+  final String argumentName = "x";
+  final String callOtherMethodsName = "callAll";
+  final String instantiatePreviousMethodName = "instantiatePrevious";
+
+  final Config config;
+
+  ClassGenerator(this.config);
+
+  int get nbClasses => config.nbClasses;
+  int get nbMethodsPerClass => config.nbMethodsPerClass;
+  bool get shouldPrintInMethod => config.shouldPrintInMethod;
+  bool get sameMethodNames => config.sameMethodNames;
+  int get nbWhileLoopsInMethod => config.nbWhileLoopsInBody;
+  bool get shareCommonSuperclass => config.shareCommonSuperclass;
+  bool get shouldEmitCallAllMethods => config.shouldEmitCallAllMethods;
+  bool get shouldEmitInstantiatePreviousMethod =>
+      config.shouldEmitInstantiatePreviousMethod;
+  int get fakeInstantiateClass => config.fakeInstantiateClass;
+  int get instantiateClassesPercent => config.instantiateClassesPercent;
+
+  Future measure(String filePrefix) async {
+    String fileName = await generateRawJs(filePrefix);
+    if (fileName == null) return;
+    Directory dir = Directory.systemTemp.createTempSync('classes');
+    try {
+      File measuring = new File("${dir.path}/measuring.js");
+      IOSink sink = measuring.openWrite();
+      sink.writeln("var start = new Date();");
+      await sink.addStream(new File(fileName).openRead());
+      sink.writeln("print(new Date() - start)");
+      String command;
+      List<String> args;
+      bool runJsShell = false;
+      if (runJsShell) {
+        command = jsShellPath;
+        print("Running $command");
+        args = [measuring.path];
+      } else {
+        command = d8Path;
+        print("Running $command");
+        args = ["--harmony-sloppy", measuring.path];
+      }
+      print("Running: $fileName");
+      int nbRuns = 10;
+      int sum = 0;
+      int sumSw = 0;
+      Stopwatch watch = new Stopwatch();
+      for (int i = 0; i < nbRuns; i++) {
+        watch.reset();
+        watch.start();
+        ProcessResult result = await Process.run(command, args);
+        if (result.exitCode != 0) {
+          print("run failed");
+          print(result.stdout);
+          print(result.stderr);
+        }
+        int elapsed = watch.elapsedMilliseconds;
+        print("  output: ${result.stdout.trim()} ($elapsed)");
+        sum += int.parse(result.stdout, onError: (str) => 0);
+        sumSw += elapsed;
+      }
+      int mean = sum == 0 ? 0 : sum ~/ nbRuns;
+      int meanSw = sumSw == 0 ? 0 : sumSw ~/ nbRuns;
+      print("  mean: $mean ($meanSw)");
+    } finally {
+      dir.deleteSync(recursive: true);
+    }
+  }
+
+  Future<String> generateRawJs(String filePrefix);
+
+  String buildFileName(String filePrefix, String extension) {
+    // TODO(floitsch): store other config info in the file name.
+    return "$filePrefix.$nbClasses.$nbMethodsPerClass."
+           "$instantiateClassesPercent.$description.$extension";
+  }
+
+  String writeFile(String filePrefix) {
+    buffer.clear();
+    emitClasses();  // Output is stored in `buffer`.
+
+    String fileName = buildFileName(filePrefix, fileExtension);
+    new File(fileName).writeAsStringSync(buffer.toString());
+    print("wrote: $fileName");
+    return fileName;
+  }
+
+  void writeln(x) => buffer.writeln(x);
+
+  String classIdToName(int id) {
+    if (id < 0) id = nbClasses + id;
+    return "Class$id";
+  }
+
+  /// [id] is per class.
+  String methodIdToName(int id, int classId) {
+    if (sameMethodNames) return "method$id";
+    return "method${classId}_$id";
+  }
+
+  // Must work for Dart and JS.
+  void emitMethodBody(int methodId, int classId) {
+    writeln("{");
+    if (shouldPrintInMethod) {
+      writeln("print('class: $classId, method: $methodId');");
+    }
+    if (nbWhileLoopsInMethod > 0) {
+      writeln("var sum = 0;");
+      for (int i = 0; i < nbWhileLoopsInMethod; i++) {
+        writeln("for (var i = 0; i < $argumentName; i++) {");
+        writeln("  sum++;");
+        writeln("}");
+      }
+      writeln("return sum;");
+    }
+    writeln("}");
+  }
+
+  // Must work for Dart and JS.
+  void emitCallOtherMethodsBody(List<int> methodIds, int classId) {
+    writeln("{");
+    writeln("var sum = 0;");
+    for (int methodId in methodIds) {
+      String methodName = methodIdToName(methodId, classId);
+      writeln("sum += this.$methodName($argumentName);");
+    }
+    writeln("return sum;");
+    writeln("}");
+  }
+
+  // Must work for Dart and JS.
+  void emitInstantiatePrevious(int classId) {
+    writeln("{");
+    if (classId == 0) {
+      writeln("return null;");
+    } else {
+      String previousClass = classIdToName(classId - 1);
+      writeln("return new $previousClass();");
+    }
+    writeln("}");
+  }
+
+  /// Should write the class using [writeln].
+  void emitClasses();
+
+  String get description;
+  String get fileExtension;
+}
+
+abstract class JavaScriptClassGenerator extends ClassGenerator {
+  bool get wrapProgram => config.shouldWrapProgram;
+  final String methodsObjectName = "methods";
+
+  JavaScriptClassGenerator(Config config) : super(config);
+
+  Future<String> generateRawJs(String filePrefix) =>
+      new Future.value(writeFile(filePrefix));
+
+  void emitUtilityFunctions();
+  void emitClass(int classId, int superclassId);
+
+  void emitClasses() {
+    if (wrapProgram) writeln("(function() {");
+    writeln("var $methodsObjectName;");
+    emitUtilityFunctions();
+    for (int i = 0; i < nbClasses; i++) {
+      int superclassId = shareCommonSuperclass && i != 0 ? 0 : null;
+      emitClass(i, superclassId);
+    }
+
+    if (fakeInstantiateClass != null) {
+      String className = classIdToName(fakeInstantiateClass);
+      writeln("""
+        if (new Date() == 42) {
+          var o = new $className();
+          do {
+            o.$callOtherMethodsName(99);
+            o = o.$instantiatePreviousMethodName();
+          } while(o != null);
+        }""");
+    }
+    if (instantiateClassesPercent != null) {
+      int targetClassId = ((nbClasses - 1) * instantiateClassesPercent) ~/ 100;
+      String targetClassName = classIdToName(targetClassId);
+      writeln("""
+        var o = new $targetClassName();
+        do {
+          o = o.$instantiatePreviousMethodName();
+        } while(o != null);
+      """);
+    }
+    if (wrapProgram) writeln("})();");
+  }
+
+  String get fileExtension => "js";
+}
+
+enum PrototypeApproach {
+  tmpFunction,
+  internalProto,
+  objectCreate
+}
+class PlainJavaScriptClassGenerator extends JavaScriptClassGenerator {
+  final PrototypeApproach prototypeApproach;
+  final bool shouldInlineInherit;
+  final bool useMethodsObject;
+
+  PlainJavaScriptClassGenerator(Config config,
+                                {this.prototypeApproach,
+                                 this.shouldInlineInherit,
+                                 this.useMethodsObject})
+      : super(config) {
+    if (prototypeApproach == null) {
+      throw "Must provide prototype approach";
+    }
+    if (shouldInlineInherit == null) {
+      throw "Must provide inlining approach";
+    }
+    if (useMethodsObject == null) {
+      throw "Must provide object-proto approach";
+    }
+    if (shouldInlineInherit &&
+        prototypeApproach == PrototypeApproach.tmpFunction) {
+      throw "Can't inline tmp-function approach";
+    }
+  }
+
+  void emitInherit(cls, superclassId) {
+    if (superclassId == null && !useMethodsObject) return;
+    String sup = (superclassId == null) ? "null" : classIdToName(superclassId);
+    if (!shouldInlineInherit) {
+      if (useMethodsObject) {
+        writeln("inherit($cls, $sup, $methodsObjectName);");
+      } else {
+        writeln("inherit($cls, $sup);");
+      }
+      return;
+    }
+    switch (prototypeApproach) {
+      case PrototypeApproach.tmpFunction:
+        throw "Should not happen";
+        break;
+      case PrototypeApproach.internalProto:
+        if (useMethodsObject) {
+          writeln("$cls.prototype = $methodsObjectName;");
+        }
+        if (superclassId != null) {
+          writeln("$cls.prototype.__proto__ = $sup.prototype;");
+        }
+        break;
+      case PrototypeApproach.objectCreate:
+        if (useMethodsObject) {
+          if (superclassId == null) {
+            writeln("$cls.prototype = $methodsObjectName;");
+          } else {
+            writeln("$cls.prototype = Object.create($sup.prototype);");
+            writeln("copyProperties($methodsObjectName, $cls.prototype);");
+          }
+        } else {
+          writeln("$cls.prototype = Object.create($sup.prototype);");
+        }
+        break;
+    }
+  }
+
+  void emitUtilityFunctions() {
+    switch (prototypeApproach) {
+      case PrototypeApproach.internalProto:
+        if (useMethodsObject) {
+          writeln('''
+            function inherit(cls, sup, methods) {
+              cls.prototype = methods;
+              if (sup != null) {
+                cls.prototype.__proto__ = sup.prototype;
+              }
+            }
+            ''');
+
+        } else {
+          writeln('''
+            function inherit(cls, sup) {
+              cls.prototype.__proto__ = sup.prototype;
+            }
+            ''');
+        }
+        break;
+      case PrototypeApproach.tmpFunction:
+        if (useMethodsObject) {
+          writeln('''
+            function inherit(cls, sup, methods) {
+              if (sup != null) {
+                function tmp() {}
+                tmp.prototype = sup.prototype;
+                var proto = new tmp();
+                proto.constructor = cls;
+                cls.prototype = proto;
+              }
+              copyProperties(methods, cls.prototype);
+            }''');
+        } else {
+          writeln('''
+            function inherit(cls, sup) {
+              function tmp() {}
+              tmp.prototype = sup.prototype;
+              var proto = new tmp();
+              proto.constructor = cls;
+              cls.prototype = proto;
+            }''');
+        }
+        break;
+      case PrototypeApproach.objectCreate:
+        if (useMethodsObject) {
+          writeln('''
+            function inherit(cls, sup, methods) {
+              if (sup == null) {
+                cls.prototype = methods;
+              } else {
+                cls.prototype = Object.create(sup.prototype);
+                copyProperties(methods, cls.prototype);
+              }
+            }
+            ''');
+        } else {
+          writeln('''
+            function inherit(cls, sup) {
+              cls.prototype = Object.create(sup.prototype);
+            }
+            ''');
+        }
+        break;
+    }
+    writeln("""
+    function copyProperties(from, to) {
+      var props = Object.keys(from);
+      for (var i = 0; i < props.length; i++) {
+        var p = props[i];
+        to[p] = from[p];
+      }
+    }""");
+  }
+
+  void emitMethod(int classId, String methodName, Function bodyEmitter,
+                  {bool emitArgument: true}) {
+    String argumentString = emitArgument ? argumentName : "";
+    if (useMethodsObject) {
+      writeln("$methodName: function($argumentString)");
+      bodyEmitter();
+      writeln(",");
+    } else {
+      String className = classIdToName(classId);
+      String proto = "$className.prototype";
+      writeln("$proto.$methodName = function($argumentString)");
+      bodyEmitter();
+    }
+  }
+
+  /// Returns the methods object, if we use an object.
+  void emitMethods(int classId) {
+    List<int> methodIds = [];
+    int nbGenericMethods = nbMethodsPerClass;
+    if (useMethodsObject) {
+      writeln("$methodsObjectName = {");
+    }
+    if (shouldEmitCallAllMethods) nbGenericMethods--;
+    for (int j = 0; j < nbGenericMethods; j++) {
+      String methodName = methodIdToName(j, classId);
+      emitMethod(classId, methodName, () => emitMethodBody(j, classId));
+      methodIds.add(j);
+    }
+    if (shouldEmitCallAllMethods) {
+      emitMethod(classId,
+      callOtherMethodsName,
+          () => emitCallOtherMethodsBody(methodIds, classId));
+    }
+    if (shouldEmitInstantiatePreviousMethod) {
+      emitMethod(classId,
+      instantiatePreviousMethodName,
+          () => emitInstantiatePrevious(classId),
+      emitArgument: false);
+    }
+    if (useMethodsObject) {
+      writeln("};");
+    }
+  }
+
+  void emitClass(int classId, int superclassId) {
+    String className = classIdToName(classId);
+    writeln("function $className() {}");
+    switch (prototypeApproach) {
+      case PrototypeApproach.objectCreate:
+        if (useMethodsObject) {
+          emitMethods(classId);
+          emitInherit(className, superclassId);
+        } else {
+          emitInherit(className, superclassId);
+          emitMethods(classId);
+        }
+        break;
+      case PrototypeApproach.tmpFunction:
+        if (useMethodsObject) {
+          emitMethods(classId);
+          emitInherit(className, superclassId);
+        } else {
+          emitInherit(className, superclassId);
+          emitMethods(classId);
+        }
+        break;
+      case PrototypeApproach.internalProto:
+        emitMethods(classId);
+        emitInherit(className, superclassId);
+        break;
+    }
+  }
+
+  String get description {
+    String protoApproachDescription;
+    switch (prototypeApproach) {
+      case PrototypeApproach.objectCreate:
+        protoApproachDescription = "objectCreate";
+        break;
+      case PrototypeApproach.tmpFunction:
+        protoApproachDescription = "tmpFunction";
+        break;
+      case PrototypeApproach.internalProto:
+        protoApproachDescription = "internalProto";
+        break;
+    }
+    String inline = shouldInlineInherit ? "inl" : "noInl";
+    String objectProto = useMethodsObject ? "obj" : "noObj";
+    return "plain_${protoApproachDescription}_${inline}_$objectProto";
+  }
+}
+
+class Es6ClassGenerator extends JavaScriptClassGenerator {
+  Es6ClassGenerator(Config config) : super(config);
+
+  void emitUtilityFunctions() {}
+
+  void emitClass(int classId, int superclassId) {
+    String className = classIdToName(classId);
+    if (superclassId != null) {
+      String superclassName = classIdToName(superclassId);
+      buffer.writeln("class $className extends $superclassName {");
+    } else {
+      buffer.writeln("class $className {");
+    }
+    List<int> methodIds = [];
+    int nbGenericMethods = nbMethodsPerClass;
+    if (shouldEmitCallAllMethods) nbGenericMethods--;
+    for (int j = 0; j < nbGenericMethods; j++) {
+      String methodName = methodIdToName(j, classId);
+      writeln("$methodName($argumentName) ");
+      emitMethodBody(j, classId);
+      methodIds.add(j);
+    }
+    if (shouldEmitCallAllMethods) {
+      writeln("$callOtherMethodsName($argumentName)");
+      emitCallOtherMethodsBody(methodIds, classId);
+    }
+    if (shouldEmitInstantiatePreviousMethod) {
+      writeln("$instantiatePreviousMethodName()");
+      emitInstantiatePrevious(classId);
+    }
+    writeln("}");
+  }
+
+  String get description => "es6";
+}
+
+class DartClassGenerator extends ClassGenerator {
+  final bool shouldUseNewEmitter;
+
+  DartClassGenerator(Config config, {this.shouldUseNewEmitter: false})
+      : super(config);
+
+  void emitClasses() {
+    // TODO(flo): instantiateAndCallPrevious
+    for (int i = 0; i < nbClasses; i++) {
+      String className = classIdToName(i);
+      writeln("class $className {");
+      List<int> methodIds = [];
+      int nbGenericMethods = nbMethodsPerClass;
+      if (shouldEmitCallAllMethods) nbGenericMethods--;
+      for (int j = 0; j < nbGenericMethods; j++) {
+        String methodName = methodIdToName(j, i);
+        writeln("$methodName($argumentName)");
+        emitMethodBody(j, i);
+        methodIds.add(j);
+      }
+      if (shouldEmitCallAllMethods) {
+        writeln("$callOtherMethodsName($argumentName)");
+        emitCallOtherMethodsBody(methodIds, i);
+      }
+      if (shouldEmitInstantiatePreviousMethod) {
+        writeln("$instantiatePreviousMethodName()");
+        emitInstantiatePrevious(i);
+      }
+      writeln("}");
+    }
+    writeln("main() {");
+    if (fakeInstantiateClass != null) {
+      String className = classIdToName(fakeInstantiateClass);
+      writeln("""
+        if (new DateTime.now().millisecondsSinceEpoch == 42) {
+          var o = new $className();
+          do {
+            o.$callOtherMethodsName(99);
+            o = o.$instantiatePreviousMethodName();
+          } while(o != null);
+        }""");
+    }
+    if (instantiateClassesPercent != null) {
+      int targetClassId = ((nbClasses - 1) * instantiateClassesPercent) ~/ 100;
+      String targetClassName = classIdToName(targetClassId);
+      writeln("""
+        var o = new $targetClassName();
+        do {
+          o = o.$instantiatePreviousMethodName();
+        } while(o != null);
+      """);
+    }
+    writeln("}");
+  }
+
+  Future<String> generateRawJs(String filePrefix) async {
+    String dartFile = writeFile(filePrefix);
+    String outFile = buildFileName(filePrefix, "js");
+    Map<String, String> env = {};
+    if (shouldUseNewEmitter) {
+      env["DART_VM_OPTIONS"] = '-Ddart2js.use.new.emitter=true';
+    }
+    print("compiling");
+    print("dart2jsPath: $dart2jsPath");
+    ProcessResult result =
+        await Process.run(dart2jsPath, [dartFile, "--out=$outFile"],
+                          environment: env);
+    if (result.exitCode != 0) {
+      print("compilation failed");
+      print(result.stdout);
+      print(result.stderr);
+      return null;
+    }
+    print("compilation done");
+    return outFile;
+  }
+
+  Future measureDart(String filePrefix, { bool useSnapshot: false }) async {
+    String dartFile = writeFile(filePrefix);
+    String command = Platform.executable;
+    Stopwatch watch = new Stopwatch();
+    Directory dir = Directory.systemTemp.createTempSync('snapshot');
+    try {
+      String measuring = dartFile;
+      if (useSnapshot) {
+        print("creating snapshot");
+        measuring = new File("${dir.path}/measuring.snapshot").path;
+        ProcessResult result =
+        await Process.run(command, ["--snapshot=$measuring", dartFile]);
+        if (result.exitCode != 0) {
+          print("snapshot creation failed");
+          print(result.stdout);
+          print(result.stderr);
+          return;
+        }
+      }
+      List<String> args = [measuring];
+      print("Running: $command ${args.join(' ')}");
+      int nbRuns = 10;
+      int sum = 0;
+      for (int i = 0; i < nbRuns; i++) {
+        watch.reset();
+        watch.start();
+        ProcessResult result = await Process.run(command, args);
+        int elapsedMilliseconds = watch.elapsedMilliseconds;
+        if (result.exitCode != 0) {
+          print("run failed");
+          print(result.stdout);
+          print(result.stderr);
+          return;
+        }
+        print("  measured time (including VM startup): $elapsedMilliseconds");
+        sum += elapsedMilliseconds;
+      }
+      if (sum != 0) {
+        print("  mean: ${sum ~/ nbRuns}");
+      }
+    } finally {
+      dir.deleteSync(recursive: true);
+    }
+  }
+
+  String get fileExtension => "dart";
+  String get description {
+    if (shouldUseNewEmitter) return "dartNew";
+    return "dart";
+  }
+}
+
+main(List<String> arguments) async {
+  String filePrefix = arguments.length > 0
+      ? arguments.first
+      : Directory.systemTemp.uri.resolve("classes").path;
+
+  Config config = new Config(
+      nbClasses: 2000,
+      nbMethodsPerClass: 20,
+      fakeInstantiateClass: -1,
+      instantiateClassesPercent: 20,
+      shareCommonSuperclass: true,
+      sameMethodNames: true,
+      shouldPrintInMethod: true,
+      nbWhileLoopsInBody: 1,
+      shouldWrapProgram: true,
+      shouldEmitCallAllMethods: true,
+      shouldEmitInstantiatePreviousMethod: true
+  );
+
+  var plain = new PlainJavaScriptClassGenerator(config,
+      prototypeApproach: PrototypeApproach.tmpFunction,
+      useMethodsObject: false,
+      shouldInlineInherit: false);
+  var plainProto = new PlainJavaScriptClassGenerator(config,
+      prototypeApproach: PrototypeApproach.internalProto,
+      useMethodsObject: false,
+      shouldInlineInherit: false);
+  var plainObjectCreate = new PlainJavaScriptClassGenerator(config,
+      prototypeApproach: PrototypeApproach.objectCreate,
+      useMethodsObject: false,
+      shouldInlineInherit: false);
+  var plainProtoInline = new PlainJavaScriptClassGenerator(config,
+      prototypeApproach: PrototypeApproach.internalProto,
+      useMethodsObject: false,
+      shouldInlineInherit: true);
+  var plainObjectCreateInline = new PlainJavaScriptClassGenerator(config,
+      prototypeApproach: PrototypeApproach.objectCreate,
+      useMethodsObject: false,
+      shouldInlineInherit: true);
+  var plainObj = new PlainJavaScriptClassGenerator(config,
+      prototypeApproach: PrototypeApproach.tmpFunction,
+      useMethodsObject: true,
+      shouldInlineInherit: false);
+  var plainProtoObj = new PlainJavaScriptClassGenerator(config,
+      prototypeApproach: PrototypeApproach.internalProto,
+      useMethodsObject: true,
+      shouldInlineInherit: false);
+  var plainObjectCreateObj = new PlainJavaScriptClassGenerator(config,
+      prototypeApproach: PrototypeApproach.objectCreate,
+      useMethodsObject: true,
+      shouldInlineInherit: false);
+  var plainProtoInlineObj = new PlainJavaScriptClassGenerator(config,
+      prototypeApproach: PrototypeApproach.internalProto,
+      useMethodsObject: true,
+      shouldInlineInherit: true);
+  var plainObjectCreateInlineObj = new PlainJavaScriptClassGenerator(config,
+      prototypeApproach: PrototypeApproach.objectCreate,
+      useMethodsObject: true,
+      shouldInlineInherit: true);
+  var es6 = new Es6ClassGenerator(config);
+  var dart = new DartClassGenerator(config);
+  var dartNew = new DartClassGenerator(config, shouldUseNewEmitter: true);
+
+  await plain.measure(filePrefix);
+  await plainProto.measure(filePrefix);
+  await plainObjectCreate.measure(filePrefix);
+  await plainProtoInline.measure(filePrefix);
+  await plainObjectCreateInline.measure(filePrefix);
+  await plainObj.measure(filePrefix);
+  await plainProtoObj.measure(filePrefix);
+  await plainObjectCreateObj.measure(filePrefix);
+  await plainProtoInlineObj.measure(filePrefix);
+  await plainObjectCreateInlineObj.measure(filePrefix);
+  await es6.measure(filePrefix);
+  await dartNew.measure(filePrefix);
+  await dart.measure(filePrefix);
+  await dart.measureDart(filePrefix);
+  await dart.measureDart(filePrefix, useSnapshot: true);
+}