data: Be explicit in data_db check

The if statement current causes the size of parent to be calcuated which
is like a len() operation on a datastore. Since we're only interested
whether the value is none, checking explictly for this gives a
small performance gain.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/lib/bb/data.py b/lib/bb/data.py
index 8c9cb0f025ca2e3869a28e5ba26869923d92f7a6..e6d523210c85c4bd594b7a01f32cb2780d963042 100644 (file)
--- a/lib/bb/data.py
+++ b/lib/bb/data.py
@@ -59,7 +59,7 @@ def init():
 def init_db(parent = None):
     """Return a new object representing the Bitbake data,
     optionally based on an existing object"""
-    if parent:
+    if parent is not None:
         return parent.createCopy()
     else:
         return _dict_type()