[Swarming] Speed up test262 upload/download.

test/test262/testcfg.py

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 21 matching lines @@
 import shutil
 import sys
 import tarfile
 
 
 from testrunner.local import statusfile
 from testrunner.local import testsuite
 from testrunner.local import utils
 from testrunner.objects import testcase
 
+ARCHIVE = os.path.join(os.path.dirname(os.path.abspath(__file__)), "data.tar")
+
 TEST_262_HARNESS_FILES = ["sta.js", "assert.js"]
 
 TEST_262_SUITE_PATH = ["data", "test"]
 TEST_262_HARNESS_PATH = ["data", "harness"]
 TEST_262_TOOLS_PATH = ["data", "tools", "packaging"]
 
 ALL_VARIANT_FLAGS_STRICT = dict(
     (v, [flags + ["--use-strict"] for flags in flag_sets])
     for v, flag_sets in testsuite.ALL_VARIANT_FLAGS.iteritems()
 )
@@ skipping 140 matching lines @@
     if os.path.exists(directory_old_name):
       shutil.rmtree(directory_old_name)
 
     archive_files = [f for f in os.listdir(self.root)
                      if f.startswith("tc39-test262-")]
     if len(archive_files) > 0:
       print "Clobber outdated test archives ..."
       for f in archive_files:
         os.remove(os.path.join(self.root, f))
 
+    print "Extracting archive..."
+    tar = tarfile.open(ARCHIVE)
+    tar.extractall(path=os.path.dirname(ARCHIVE))
+    tar.close()
+
 
 def GetSuite(name, root):
   return Test262TestSuite(name, root)