Utilize all cores on IE bots

tools/bots/compiler.py

 #!/usr/bin/python
 
 # 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.
 
 """
 Dart2js buildbot steps
 
 Runs tests for the  dart2js compiler.
@@ skipping 144 matching lines @@
    Args:
      - runtime: either 'd8', 'jsshell', or one of the browsers, see GetBuildInfo
      - mode: either 'debug' or 'release'
      - system: either 'linux', 'mac', 'win7', or 'win8'
      - flags: extra flags to pass to test.dart
      - is_buildbot: true if we are running on a real buildbot instead of
        emulating one.
      - test_set: Specification of a non standard test set, default None
   """
 
-  if system.startswith('win') and runtime.startswith('ie'):
-    # There should not be more than one InternetExplorerDriver instance
-    # running at a time. For details, see
-    # http://code.google.com/p/selenium/wiki/InternetExplorerDriver.

[ricow1, 2013/01/29 15:41:17]

You could copy this comment to the test file

[kustermann, 2013/01/29 16:08:55]

Done.

-    flags += ['-j1']
-
   def GetPath(runtime):
     """ Helper to get the path to the Chrome or Firefox executable for a
     particular platform on the buildbot. Throws a KeyError if runtime is not
     either 'chrome' or 'ff'."""
     if system == 'mac':
       partDict = {'chrome': 'Google\\ Chrome', 'ff': 'Firefox'}
       mac_path = '/Applications/%s.app/Contents/MacOS/%s'
       path_dict = {'chrome': mac_path % (partDict[runtime], partDict[runtime]),
           'ff': mac_path % (partDict[runtime], partDict[runtime].lower())}
     elif system == 'linux':
@@ skipping 141 matching lines @@
   """
   with bot.BuildStep('Build SDK and d8'):
     args = [sys.executable, './tools/build.py', '--mode=' + build_info.mode,
             'dart2js_bot']
     print 'Build SDK and d8: %s' % (' '.join(args))
     bot.RunProcess(args)
 
 
 if __name__ == '__main__':
   bot.RunBot(GetBuildInfo, RunCompilerTests, build_step=BuildCompiler)