From e059fdef6bea233de1c4fa70c679f93597ba783e Mon Sep 17 00:00:00 2001
From: Shane Harvey <shnhrv@gmail.com>
Date: Wed, 12 Jun 2024 13:20:52 -0700
Subject: [PATCH] PYTHON-4347 [v4.8] Improve performance by only calling
 get_topology once (#1676)

---
 pymongo/mongo_client.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/pymongo/mongo_client.py b/pymongo/mongo_client.py
index 6cc1b2ced..ba14cbba2 100644
--- a/pymongo/mongo_client.py
+++ b/pymongo/mongo_client.py
@@ -862,6 +862,7 @@ class MongoClient(common.BaseObject, Generic[_DocumentType]):
             server_monitoring_mode=options.server_monitoring_mode,
         )
 
+        self._opened = False
         self._init_background()
 
         if connect:
@@ -1245,9 +1246,11 @@ class MongoClient(common.BaseObject, Generic[_DocumentType]):
         If this client was created with "connect=False", calling _get_topology
         launches the connection process in the background.
         """
-        self._topology.open()
-        with self.__lock:
-            self._kill_cursors_executor.open()
+        if not self._opened:
+            self._topology.open()
+            with self.__lock:
+                self._kill_cursors_executor.open()
+            self._opened = True
         return self._topology
 
     @contextlib.contextmanager