Roll Observatory packages and add a roll script

packages/polymer_expressions/benchmark/parse.dart

+// Copyright (c) 2013, 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 polymer_expressions.benchmark.parse;
+
+import 'package:benchmark_harness/benchmark_harness.dart';
+import 'package:polymer_expressions/parser.dart' show parse;
+
+/**
+ * Measures pure parsing time of several expressions
+ */
+class PolymerParseBenchmark extends BenchmarkBase {
+  PolymerParseBenchmark() : super('PolymerParseBenchmark');
+
+  run() {
+    parse('foo.bar.baz');
+    parse('f()');
+    parse('(1 + 2) * 3');
+    parse('1 + 2.0 + false + "abcdefg" + {"a": 1}');
+    parse('(a * (b * (c * (d * (e)))))');
+    parse('a(b(c(d(e(f)))))');
+  }
+}
+
+main() {
+  new PolymerParseBenchmark().report();
+}