Extensions Docs Server: Large performance increase

chrome/common/extensions/docs/server2/example_zipper.py

 # Copyright (c) 2012 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 os
 from io import BytesIO
 import re
 from zipfile import ZipFile
 
+import file_system_cache as fs_cache
+
 class ExampleZipper(object):
   """This class creates a zip file given a samples directory.
   """
   def __init__(self, file_system, cache_builder, base_path, match_path):
     self._base_path = base_path
-    self._zip_cache = cache_builder.build(self._MakeZipFile)
+    self._zip_cache = cache_builder.build(self._MakeZipFile,
+                                          fs_cache.ZIP)
     self._file_system = file_system
     self._match_path = match_path
 
   def _MakeZipFile(self, files):
     zip_path = os.path.commonprefix(files).rsplit('/', 1)[-2]
     prefix = zip_path.rsplit('/', 1)[-2]
     if zip_path + '/manifest.json' not in files:
       return None
     zip_bytes = BytesIO()
     zip_file = ZipFile(zip_bytes, mode='w')
     try:
       for name, file_contents in (
           self._file_system.Read(files, binary=True).Get().iteritems()):
         zip_file.writestr(name[len(prefix):].strip('/'), file_contents)
     finally:
       zip_file.close()
     return zip_bytes.getvalue()
 
   def Create(self, path):
     """ Creates a new zip file from the recursive contents of |path|
     as returned by |_zip_cache|.
     Paths within the zip file are given relative to and including |path|.
     """
     return self._zip_cache.GetFromFileListing(
         self._base_path + '/' + path)