Revert "A/B fasta performance measurement harness"

pkg/front_end/tool/fasta/abcompile.dart

Index: pkg/front_end/tool/fasta/abcompile.dart
diff --git a/pkg/front_end/tool/fasta/abcompile.dart b/pkg/front_end/tool/fasta/abcompile.dart
deleted file mode 100644
index 3bedc4d110a375dca6ecd26f72d04fb26b4ccfa9..0000000000000000000000000000000000000000
--- a/pkg/front_end/tool/fasta/abcompile.dart
+++ /dev/null
@@ -1,160 +0,0 @@
-import 'dart:async';
-import 'dart:convert';
-import 'dart:math';
-import 'dart:io';
-
-import 'standard_deviation.dart';
-
-const String bRootPath = const String.fromEnvironment("bRoot");
-const int iterations = const int.fromEnvironment("iterations", defaultValue: 1);
-
-/// Compare the performance of two different fast implementations
-/// by alternately launching the compile application in this directory
-/// and the compile application location in the repo specified by "bRoot"
-/// via -DbRoot=/absolute/path/to/other/sdk/repo
-main(List<String> args) async {
-  print(args);
-  if (bRootPath == null) {
-    print('Expected -DbRoot=/absolute/path/to/other/sdk/repo');
-    exit(1);
-  }
-
-  // The root of this Dart SDK repo "A"
-  Uri aRoot = Platform.script.resolve('../../../..');
-
-  // The root of the other Dart SDK repo "B"
-  Uri bRoot = new Uri.directory(bRootPath);
-
-  // Sanity check
-  String relPath = 'pkg/front_end/tool/fasta/compile.dart';
-  Uri aCompile = aRoot.resolve(relPath);
-  if (!new File(aCompile.toFilePath()).existsSync()) {
-    print('Failed to find $aCompile');
-    exit(1);
-  }
-  Uri bCompile = bRoot.resolve(relPath);
-  if (!new File(bCompile.toFilePath()).existsSync()) {
-    print('Failed to find $bCompile');
-    exit(1);
-  }
-
-  print('Comparing:');
-  print('A: $aCompile');
-  print('B: $bCompile');
-  print('');
-
-  List<double> aCold = <double>[];
-  List<double> aWarm = <double>[];
-  List<double> bCold = <double>[];
-  List<double> bWarm = <double>[];
-  for (int count = 0; count < 15; ++count) {
-    await run(aRoot, aCompile, args, aCold, aWarm);
-    await run(bRoot, bCompile, args, bCold, bWarm);
-  }
-
-  print('');
-  print('Raw data:');
-  print('A cold, A warm, B cold, B warm');
-  for (int index = 0; index < aCold.length; ++index) {
-    print('${aCold[index]}, ${aWarm[index]}, ${bCold[index]}, ${bWarm[index]}');
-  }
-
-  double aColdMean = average(aCold);
-  double aWarmMean = average(aWarm);
-  double bColdMean = average(bCold);
-  double bWarmMean = average(bWarm);
-
-  print('');
-  print('Average:');
-  print('$aColdMean, $aWarmMean, $bColdMean, $bWarmMean');
-
-  double aColdStdDev = standardDeviation(aColdMean, aCold);
-  double aWarmStdDev = standardDeviation(aWarmMean, aWarm);
-  double bColdStdDev = standardDeviation(bColdMean, bCold);
-  double bWarmStdDev = standardDeviation(bWarmMean, bWarm);
-
-  double aColdStdDevMean = standardDeviationOfTheMean(aCold, aColdStdDev);
-  double aWarmStdDevMean = standardDeviationOfTheMean(aWarm, aWarmStdDev);
-  double bColdStdDevMean = standardDeviationOfTheMean(bCold, bColdStdDev);
-  double bWarmStdDevMean = standardDeviationOfTheMean(bWarm, bWarmStdDev);
-
-  print('');
-  print('Uncertainty:');
-  print(
-      '$aColdStdDevMean, $aWarmStdDevMean, $bColdStdDevMean, $bWarmStdDevMean');
-
-  double coldDelta = aColdMean - bColdMean;
-  double coldStdDevMean =
-      sqrt(pow(aColdStdDevMean, 2) + pow(bColdStdDevMean, 2));
-  double warmDelta = aWarmMean - bWarmMean;
-  double warmStdDevMean =
-      sqrt(pow(aWarmStdDevMean, 2) + pow(bWarmStdDevMean, 2));
-
-  print('');
-  print('Summary:');
-  print('  A cold start - B cold start : $coldDelta');
-  print('  Uncertainty                 : $coldStdDevMean');
-  print('');
-  print('  A warm runs - B warm runs   : $warmDelta');
-  print('  Uncertainty                 : $warmStdDevMean');
-}
-
-const String _wroteProgram = 'Wrote program to';
-const String _coldStart = 'Cold start (first run):';
-const String _warmRun = 'Warm run average (runs #4';
-
-/// Launch the specified dart program, forwarding all arguments and environment
-/// that was passed to this program
-Future<Null> run(Uri workingDir, Uri dartApp, List<String> args,
-    List<double> cold, List<double> warm) async {
-  print('Running $dartApp');
-
-  void processLine(String line) {
-    if (line.contains(_wroteProgram)) {
-      // Show progress
-      stdout
-        ..write('.')
-        ..flush();
-      return;
-    }
-    int index = line.indexOf(_coldStart);
-    if (index >= 0) {
-      cold.add(double.parse(line.substring(index + _coldStart.length)));
-      print('\ncold: ${cold.last}');
-      return;
-    }
-    index = line.indexOf(_warmRun);
-    if (index >= 0) {
-      index = line.indexOf(':', index + _warmRun.length);
-      warm.add(double.parse(line.substring(index + 1)));
-      print('warm: ${warm.last}');
-      return;
-    }
-  }
-
-  String workingDirPath = workingDir.toFilePath();
-  List<String> procArgs = <String>[
-    '-Diterations=$iterations',
-    dartApp.toFilePath()
-  ];
-  procArgs.addAll(args);
-
-  Process process = await Process.start(Platform.executable, procArgs,
-      workingDirectory: workingDirPath);
-  stderr.addStream(process.stderr);
-  StreamSubscription<String> stdOutSubscription;
-  stdOutSubscription = process.stdout
-      .transform(UTF8.decoder)
-      .transform(new LineSplitter())
-      .listen(processLine, onDone: () {
-    stdOutSubscription.cancel();
-  }, onError: (e) {
-    print('Error: $e');
-    stdOutSubscription.cancel();
-  });
-  int code = await process.exitCode;
-  if (code != 0) {
-    throw 'fail: $code';
-  }
-  print('');
-}