entrypoint to measure performance of the analyzer frontend

pkg/analyzer_cli/tool/perf_test.dart

Index: pkg/analyzer_cli/tool/perf_test.dart
diff --git a/pkg/analyzer_cli/tool/perf_test.dart b/pkg/analyzer_cli/tool/perf_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..3302a51e1d7dddcd52a816539837f5413a0fc277
--- /dev/null
+++ b/pkg/analyzer_cli/tool/perf_test.dart
@@ -0,0 +1,11 @@
+// Copyright (c) 2016, 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.
+
+/// The only purpose of this file is to enable analyzer tests on `perf.dart`,
+/// the code here just has a dummy import to the rest of the code.
+library analyzer_cli.tool.perf_test;
+
+import 'perf.dart' as m;
+
+main() => print('done ${m.scanTotalChars}');