From 862f0de839b589e4c3ccbe9eddb65415eca5a859 Mon Sep 17 00:00:00 2001
From: ryan-crabbe <128659760+ryan-crabbe@users.noreply.github.com>
Date: Sat, 7 Feb 2026 10:54:07 -0800
Subject: [PATCH] perf: guard debug f-string in update_environment_variables to
 avoid evaluation when disabled (#20360)

---
 litellm/litellm_core_utils/litellm_logging.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/litellm/litellm_core_utils/litellm_logging.py b/litellm/litellm_core_utils/litellm_logging.py
index d70798060c..7ae62718af 100644
--- a/litellm/litellm_core_utils/litellm_logging.py
+++ b/litellm/litellm_core_utils/litellm_logging.py
@@ -526,7 +526,8 @@ class Logging(LiteLLMLoggingBaseClass):
         }
         self.litellm_request_debug = litellm_params.get("litellm_request_debug", False)
         self.logger_fn = litellm_params.get("logger_fn", None)
-        verbose_logger.debug(f"self.optional_params: {self.optional_params}")
+        if _is_debugging_on() or self.litellm_request_debug:
+            verbose_logger.debug(f"self.optional_params: {self.optional_params}")
 
         self.model_call_details.update(
             {