Fix some low hanging inefficiencies in the docs server

tools/json_schema_compiler/memoize.py

Index: tools/json_schema_compiler/memoize.py
diff --git a/tools/json_schema_compiler/memoize.py b/tools/json_schema_compiler/memoize.py
new file mode 100644
index 0000000000000000000000000000000000000000..1402a6ecd80990db3192a92be40d71f67f24fabb
--- /dev/null
+++ b/tools/json_schema_compiler/memoize.py
@@ -0,0 +1,13 @@
+# Copyright 2013 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.
+
+def memoize(fn):
+  '''Decorates |fn| to memoize.
+  '''
+  memory = {}
+  def impl(*args):
+    if args not in memory:
+      memory[args] = fn(*args)
+    return memory[args]
+  return impl