Add a startup benchmark and rudimentary scripts for running benchmarks.

benchmarks/benchmark_runner.py

Index: benchmarks/benchmark_runner.py
diff --git a/benchmarks/benchmark_runner.py b/benchmarks/benchmark_runner.py
new file mode 100755
index 0000000000000000000000000000000000000000..590ab25acf0327e8e78ada34a54a8a2bb36a87ea
--- /dev/null
+++ b/benchmarks/benchmark_runner.py
@@ -0,0 +1,70 @@
+#!/usr/bin/env python
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import argparse
+import imp
+import importlib
+import os
+import sys
+
+try:
+  imp.find_module('mopy')
+except ImportError:
+  sys.path.append(os.path.abspath(os.path.join(
+      __file__, os.pardir, os.pardir, 'mojo', 'tools')))
+from mopy.paths import Paths
+
+
+class BenchmarkRunner(object):
+  def __init__(self, args):
+    self._args = args
+    self._benchmark_dir = os.path.dirname(os.path.realpath(__file__))
+    if args.release:
+      build_directory = os.path.join('out', 'Release')
+    else:
+      build_directory = os.path.join('out', 'Debug')
+    self._paths = Paths(build_directory)
+
+  def _list_tests(self):
+    for name in os.listdir(self._benchmark_dir):
+      path = os.path.join(self._benchmark_dir, name)
+      if os.path.isdir(path):
+        yield name
+
+  def _run_test(self, test_name):
+    print "Running %s ..." % test_name
+    run_script_path = os.path.join(self._benchmark_dir, test_name, 'run.py')
+    if os.path.isfile(run_script_path):
+      run_module = '.'.join([test_name, 'run'])
+      importlib.import_module(run_module)
+      result = sys.modules[run_module].run(self._args, self._paths)
+
+      #TODO(yzshen): (1) consider using more structured result;
+      #              (2) upload the result to server.
+      print result
+
+  def run(self):
+    for test in self._list_tests():
+      self._run_test(test)
+
+
+def main():
+  parser = argparse.ArgumentParser(
+      description='Mojo performance benchmark runner')
+
+  debug_group = parser.add_mutually_exclusive_group()
+  debug_group.add_argument('--release',
+                           help='test against release build (default)',
+                           default=True, action='store_true')
+  debug_group.add_argument('--debug', help='test against debug build',
+                           default=False, dest='release', action='store_false')
+
+  args = parser.parse_args()
+
+  BenchmarkRunner(args).run()
+
+
+if __name__ == '__main__':
+  sys.exit(main())