Improve List implementation.

dart/frog/frog.py

 #!/usr/bin/env python
 # Copyright (c) 2011, 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.
 
 """Command line wrapper to run the frog compiler under the Dart VM"""
 
 # TODO(jimhug): This is a temporary hack to enable running on the VM.  We need
 #   the ability to get command-line arguments, to return exit codes, and to
 #   communicate with spawned processes in the VM for this to go away.
@@ skipping 59 matching lines @@
     # TODO(jimhug): Make it easier to enable and disable this for tests.
     #default='--enable_type_checks --enable_asserts',
     default='',
     help='Flags to pass to the VM that is running frog itself.')
 
   optionParser.add_option('--vm',
     default=GetDart(),
     help='The location of the VM.')
 
   optionParser.add_option('--js_cmd',
-    default = 'node --crankshaft', # node is really slow without this.
+    default = '%s --crankshaft' % D8,
     metavar='FILE', help='The shell cmd to use to run output JS code.')
 
   optionParser.add_option('--keep_files',
       action='store_true', help='Do not remove temporary files.')
 
   # TODO(vsm): Hook in HtmlConverter.
   optionParser.add_option('--html',
       action='store_true', help='Invoke this in the browser instead of node/d8.')
   optionParser.add_option('--browser',
       default = None,
@@ skipping 124 matching lines @@
   else:
     print 'Compilation succeded. Code generated in: %s' % outfile
 
   if cleanup: shutil.rmtree(workdir)
   if result != 0:
     return 1
   return 0
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))