Shell script to ease running fasta tools.

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 0e54f89d191c58253b5629d2357519afeba61db0..0000000000000000000000000000000000000000
--- a/pkg/front_end/tool/fasta/abcompile.dart
+++ /dev/null
@@ -1,199 +0,0 @@
-// Copyright (c) 2017, 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.
-
-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 abIterations =
-    const int.fromEnvironment("abIterations", defaultValue: 15);
-const int iterations =
-    const int.fromEnvironment("iterations", defaultValue: 15);
-
-/// 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>[];
-
-  var stopwatch = new Stopwatch()..start();
-  for (int count = 0; count < abIterations; ++count) {
-    print('A/B iteration ${count + 1} of $abIterations ...');
-    await run(aRoot, aCompile, args, aCold, aWarm);
-    await run(bRoot, bCompile, args, bCold, bWarm);
-  }
-  stopwatch.stop();
-  print('Overall run time: ${stopwatch.elapsed.inMinutes} minutes');
-
-  print('');
-  print('Raw data:');
-  print('A cold, A warm, B cold, B warm');
-  for (int index = 0; index < aCold.length; ++index) {
-    print('${aCold[index]}, ${aWarm[index]}, ${bCold[index]}, ${bWarm[index]}');
-  }
-
-  if (aWarm.length < 1) {
-    return;
-  }
-
-  double aColdMean = average(aCold);
-  double aWarmMean = average(aWarm);
-  double bColdMean = average(bCold);
-  double bWarmMean = average(bWarm);
-
-  print('');
-  print('Average:');
-  print('$aColdMean, $aWarmMean, $bColdMean, $bWarmMean');
-
-  if (aWarm.length < 2) {
-    return;
-  }
-
-  double aColdStdDev = standardDeviation(aColdMean, aCold);
-  double aWarmStdDev = standardDeviation(aWarmMean, aWarm);
-  double bColdStdDev = standardDeviation(bColdMean, bCold);
-  double bWarmStdDev = standardDeviation(bWarmMean, bWarm);
-
-  double aColdSDM = standardDeviationOfTheMean(aCold, aColdStdDev);
-  double aWarmSDM = standardDeviationOfTheMean(aWarm, aWarmStdDev);
-  double bColdSDM = standardDeviationOfTheMean(bCold, bColdStdDev);
-  double bWarmSDM = standardDeviationOfTheMean(bWarm, bWarmStdDev);
-
-  print('');
-  print('Uncertainty:');
-  print('$aColdSDM, $aWarmSDM, $bColdSDM, $bWarmSDM');
-
-  double coldDelta = aColdMean - bColdMean;
-  double coldUncertainty = sqrt(pow(aColdSDM, 2) + pow(bColdSDM, 2));
-  double warmDelta = aWarmMean - bWarmMean;
-  double warmUncertainty = sqrt(pow(aWarmSDM, 2) + pow(bWarmSDM, 2));
-
-  double coldDeltaPercent = (coldDelta / bColdMean * 1000).round() / 10;
-  double coldUncertaintyPercent =
-      (coldUncertainty / bColdMean * 1000).round() / 10;
-  double warmDeltaPercent = (warmDelta / bWarmMean * 1000).round() / 10;
-  double warmUncertaintyPercent =
-      (warmUncertainty / bWarmMean * 1000).round() / 10;
-
-  double coldBest = coldDelta - 3 * coldUncertainty;
-  double coldBestPercent = coldDeltaPercent - 3 * coldUncertaintyPercent;
-  double coldWorst = coldDelta + 3 * coldUncertainty;
-  double coldWorstPercent = coldDeltaPercent + 3 * coldUncertaintyPercent;
-
-  double warmBest = warmDelta - 3 * warmUncertainty;
-  double warmBestPercent = warmDeltaPercent - 3 * warmUncertaintyPercent;
-  double warmWorst = warmDelta + 3 * warmUncertainty;
-  double warmWorstPercent = warmDeltaPercent + 3 * warmUncertaintyPercent;
-
-  print('');
-  print('Summary:');
-  print('$coldDelta, $coldDeltaPercent%, A cold start - B cold start');
-  print('$coldUncertainty, $coldUncertaintyPercent%, Propagated uncertainty');
-  print('$coldBest, $coldBestPercent%, 99.9% best case');
-  print('$coldWorst, $coldWorstPercent%, 99.9% worst case');
-  print('');
-  print('$warmDelta, $warmDeltaPercent%, A warm runs - B warm runs');
-  print('$warmUncertainty, $warmUncertaintyPercent%, Propagated uncertainty');
-  print('$warmBest, $warmBestPercent%, 99.9% best case');
-  print('$warmWorst, $warmWorstPercent%, 99.9% worst case');
-}
-
-const String _iterationTag = '=== Iteration ';
-const String _summaryTag = 'Summary: {"';
-
-/// 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.startsWith(_iterationTag)) {
-      // Show progress
-      stdout
-        ..write('.')
-        ..flush();
-      return;
-    }
-    if (line.startsWith(_summaryTag)) {
-      String json = line.substring(_summaryTag.length - 2);
-      Map<String, dynamic> results = JSON.decode(json);
-      List<double> elapsedTimes = results['elapsedTimes'];
-      print('\nElapse times: $elapsedTimes');
-      if (elapsedTimes.length > 0) {
-        cold.add(elapsedTimes[0]);
-      }
-      if (elapsedTimes.length > 4) {
-        // Drop the first 3 and average the remaining
-        warm.add(average(elapsedTimes.sublist(3)));
-      }
-      return;
-    }
-  }
-
-  String workingDirPath = workingDir.toFilePath();
-  List<String> procArgs = <String>[
-    '-Diterations=$iterations',
-    '-Dsummary=true',
-    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('');
-}