From a4d81e44a7cd3dafb0bf12f7cac5ff511db18e60 Mon Sep 17 00:00:00 2001 From: Alexandru DAMIAN Date: Mon, 16 Sep 2013 07:40:20 +0000 Subject: data_smart: Add explict None checks Simple if xxx checks end up calling len(xxx). We're interested in the specific case of None which means we can break out the iterator much earlier after the first item. This adds in the specific tests for None in what is a hot path in the data store code which gives small performance gains. Signed-off-by: Richard Purdie --- lib/bb/data_smart.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'lib/bb/data_smart.py') diff --git a/lib/bb/data_smart.py b/lib/bb/data_smart.py index 1bb186e10..970e404b1 100644 --- a/lib/bb/data_smart.py +++ b/lib/bb/data_smart.py @@ -588,7 +588,7 @@ class DataSmart(MutableMapping): def getVarFlag(self, var, flag, expand=False, noweakdefault=False): local_var = self._findVar(var) value = None - if local_var: + if local_var is not None: if flag in local_var: value = copy.copy(local_var[flag]) elif flag == "_content" and "defaultval" in local_var and not noweakdefault: @@ -599,7 +599,7 @@ class DataSmart(MutableMapping): if flag == "_content": cachename = var value = self.expand(value, cachename) - if value and flag == "_content" and local_var and "_removeactive" in local_var: + if value is not None and flag == "_content" and local_var is not None and "_removeactive" in local_var: filtered = filter(lambda v: v not in local_var["_removeactive"], value.split(" ")) value = " ".join(filtered) -- cgit 1.2.3-korg