diff --git a/minerva/athena.py b/minerva/athena.py
index 6c12e48..e6d927d 100644
--- a/minerva/athena.py
+++ b/minerva/athena.py
@@ -67,6 +67,8 @@ class Execute:
             time.sleep(5)
             stat = self.status()
 
+        ms = self.info_cache['Statistics']['TotalExecutionTimeInMillis']
+        self.runtime = datetime.timedelta(seconds=ms / 1000)
         return stat # finalized state
 
 
diff --git a/minerva/parallel.py b/minerva/parallel.py
index 8e97ead..5f4a182 100644
--- a/minerva/parallel.py
+++ b/minerva/parallel.py
@@ -15,6 +15,10 @@ from joblib import Parallel, delayed
 #
 #   parallel_map(say, [str(i) for i in range(10)], cores=4)
 def parallel_map(func=None, data=None, cores=8):
+    # Base case
+    if not data:
+        return []
+
     cores  = min(cores, len(data))
     size   = math.ceil(len(data) / cores)
     groups = [data[i:i + size] for i in range(0, len(data), size)]
diff --git a/pyproject.toml b/pyproject.toml
index 7ffe039..5ee9448 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "minerva"
-version = "0.3.2"
+version = "0.3.3"
 description = "Easier access to AWS Athena and Redshift"
 authors = [
   "Ari Brown <ari@airintech.com>",
@@ -15,3 +15,4 @@ readme = "README.md"
 python = ">3.9, <3.11"
 boto3 = "^1.26.161"
 pyarrow = "^12.0.1"
+joblib = "^1.1.0"