From 26c684081433efe9855e384266d33ead592c1cd4 Mon Sep 17 00:00:00 2001
From: correctmost <134317971+correctmost@users.noreply.github.com>
Date: Tue, 6 Aug 2024 21:47:01 -0400
Subject: [PATCH] Avoid overhead of cast() calls when not type checking

---
 astroid/transforms.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/astroid/transforms.py b/astroid/transforms.py
index 5f0e533136..2ec576f897 100644
--- a/astroid/transforms.py
+++ b/astroid/transforms.py
@@ -78,7 +78,9 @@ def _transform(self, node: SuccessfulInferenceResult) -> SuccessfulInferenceResu
     def _visit(self, node: nodes.NodeNG) -> SuccessfulInferenceResult:
         for name in node._astroid_fields:
             value = getattr(node, name)
-            value = cast(_Vistables, value)
+            if TYPE_CHECKING:
+                value = cast(_Vistables, value)
+
             visited = self._visit_generic(value)
             if visited != value:
                 setattr(node, name, visited)