viz: cache datetime.now() in query_obj (#955)

It shouldn't be a big deal, and it's pretty cheap on linux, but still :)
apache · Aug 17, 2016 · cc058e5 · cc058e5
1 parent 061d4f1
commit cc058e5
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/caravel/viz.py b/caravel/viz.py
@@ -224,8 +224,9 @@ def query_obj(self):
             form_data.get("row_limit", config.get("ROW_LIMIT")))
         since = form_data.get("since", "1 year ago")
         from_dttm = utils.parse_human_datetime(since)
-        if from_dttm > datetime.now():
-            from_dttm = datetime.now() - (from_dttm-datetime.now())
+        now = datetime.now()
+        if from_dttm > now:
+            from_dttm = now - (from_dttm - now)
         until = form_data.get("until", "now")
         to_dttm = utils.parse_human_datetime(until)
         if from_dttm > to_dttm: