rebaseline_server: multithreaded loading/diffing of images

gm/rebaseline_server/compare_to_expectations.py

 #!/usr/bin/python
 
 """
 Copyright 2013 Google Inc.
 
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 
 Repackage expected/actual GM results as needed by our HTML rebaseline viewer.
 """
@@ skipping 71 matching lines @@
     if builder_regex_list != None:
       self.set_match_builders_pattern_list(builder_regex_list)
     self._image_diff_db = imagediffdb.ImageDiffDB(generated_images_root)
     self._diff_base_url = (
         diff_base_url or
         download_actuals.create_filepath_url(generated_images_root))
     self._actuals_root = actuals_root
     self._expected_root = expected_root
     self._load_actual_and_expected()
     self._timestamp = int(time.time())
+    logging.info('Number of download file collisions: %s' %
+                 imagediffdb.global_file_collisions)
     logging.info('Results complete; took %d seconds.' %
                  (self._timestamp - time_start))
 
   def edit_expectations(self, modifications):
     """Edit the expectations stored within this object and write them back
     to disk.
 
     Note that this will NOT update the results stored in self._results[] ;
     in order to see those updates, you must instantiate a new
     ExpectationComparisons object based on the (now updated) files on disk.
@@ skipping 264 matching lines @@
   results_obj = ExpectationComparisons(actuals_root=args.actuals,
                                        expected_root=args.expectations,
                                        generated_images_root=args.workdir)
   gm_json.WriteToFile(
       results_obj.get_packaged_results_of_type(results_type=args.results),
       args.outfile)
 
 
 if __name__ == '__main__':
   main()