diff --git a/pymongo/topology_description.py b/pymongo/topology_description.py
index ac296cac4..e8d34e120 100644
--- a/pymongo/topology_description.py
+++ b/pymongo/topology_description.py
@@ -34,7 +34,7 @@ from bson.min_key import MinKey
 from bson.objectid import ObjectId
 from pymongo import common
 from pymongo.errors import ConfigurationError
-from pymongo.read_preferences import ReadPreference, _AggWritePref, _ServerMode
+from pymongo.read_preferences import Primary, ReadPreference, _AggWritePref, _ServerMode
 from pymongo.server_description import ServerDescription
 from pymongo.server_selectors import Selection
 from pymongo.server_type import SERVER_TYPE
@@ -335,6 +335,14 @@ class TopologyDescription:
             description = self.server_descriptions().get(address)
             return [description] if description else []
 
+        # Primary selection fast path
+        if self.topology_type == TOPOLOGY_TYPE.ReplicaSetWithPrimary and isinstance(
+            selector, Primary
+        ):
+            for sd in self._server_descriptions.values():
+                if sd.server_type == SERVER_TYPE.RSPrimary:
+                    return [sd]
+
         selection = Selection.from_topology_description(self)