Extension docs server: many changes to bring down the latency of the server,

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

Index: chrome/common/extensions/docs/server2/samples_data_source.py
diff --git a/chrome/common/extensions/docs/server2/samples_data_source.py b/chrome/common/extensions/docs/server2/samples_data_source.py
index c712651e8a96453ec3ff98685e1fd2b40554d20b..4cc1b2fe2cbbdd417b2240f12c35ba1a97de895d 100644
--- a/chrome/common/extensions/docs/server2/samples_data_source.py
+++ b/chrome/common/extensions/docs/server2/samples_data_source.py
@@ -5,6 +5,7 @@
 import json
 import logging
 import re
+import time
 
 import third_party.json_schema_compiler.json_comment_eater as json_comment_eater
 import third_party.json_schema_compiler.model as model
@@ -39,8 +40,8 @@ class SamplesDataSource(object):
     def Create(self, request):
       """Returns a new SamplesDataSource bound to |request|.
       """
-      return SamplesDataSource(self._extensions_cache,
-                               self._apps_cache,
+      return SamplesDataSource(self._extensions_cache.ScopeToRequest(),
+                               self._apps_cache.ScopeToRequest(),
                                self._samples_path,
                                request)
 
@@ -203,6 +204,13 @@ class SamplesDataSource(object):
     return self.get(key)
 
   def get(self, key):
+    start_time = time.time()
+    try:
+      return self._do_get(key)
+    finally:
+      logging.info("SamplesDataSource: %sms", (time.time() - start_time) * 1000)
+
+  def _do_get(self, key):
     return {
       'apps': lambda: self._CreateSamplesDict('apps'),
       'extensions': lambda: self._CreateSamplesDict('extensions')