Clean up benchmark code.

benchmark/before.dart.txt

-// Copyright (c) 2014, 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.
-
-library dart_style.benchmark.benchmark;
-
-import 'dart:io';
-
-import 'package:dart_style/dart_style.dart';
-
-const NUM_TRIALS = 100;
-const FORMATS_PER_TRIAL = 30;
-
-void main(List<String> args) {
-  var best = 99999999.0;
-
-  // Run the benchmark several times. This ensures the VM is warmed up and lets
-  // us see how much variance there is.
-  for (var i = 0; i <= NUM_TRIALS; i++) {
-    var start = new DateTime.now();
-
-    // For a single benchmark, format the source multiple times.
-    for (var j = 0; j < FORMATS_PER_TRIAL; j++) {
-      formatSource();
-    }
-
-    var elapsed = new DateTime.now()
-        .difference(start).inMilliseconds / FORMATS_PER_TRIAL;
-
-    // Keep track of the best run so far.
-    if (elapsed >= best) continue;
-    best = elapsed;
-
-    // Don't print the first run. It's always terrible since the VM hasn't
-    // warmed up yet.
-    if (i == 0) continue;
-    printResult("Run ${padLeft('#$i', 3)}", elapsed);
-  }
-
-  printResult("Best   ", best);
-}
-
-void printResult(String label, double time) {
-  print("$label: ${padLeft(time.toStringAsFixed(2), 4)}ms "
-      "${'=' * ((time * 5).toInt())}");
-}
-
-String padLeft(input, int length) {
-  var result = input.toString();
-  if (result.length < length) {
-    result = " " * (length - result.length) + result;
-  }
-
-  return result;
-}
-
-void formatSource() {
-  var formatter = new DartFormatter();
-  var result = formatter.format(source);
-
-  // Sanity check to make sure the output is what we expect and to make sure
-  // the VM doesn't optimize "dead" code away.
-  if (result.length != 29791) {
-    print("Incorrect output (length ${result.length}):\n$result");
-    exit(1);
-  }
-}
-
-const source = r"""
 // Copyright (c) 2012, 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.
 
 library pub.solver.backtracking_solver;
 
 import 'dart:async';
 import 'dart:collection' show Queue;
 
 import '../barback.dart' as barback;
@@ skipping 794 matching lines @@
 /// with the current SDK.
 ///
 /// Throws a [SolveFailure] if not.
 void _validateSdkConstraint(Pubspec pubspec) {
   if (pubspec.environment.sdkVersion.allows(sdk.version)) return;
 
   throw new BadSdkVersionException(
       pubspec.name,
       'Package ${pubspec.name} requires SDK version '
           '${pubspec.environment.sdkVersion} but the current SDK is ' '${sdk.version}.');
-}
-""";
+}