From 76985faa118835e1b8ee2e5fb8ce51631d90ffd4 Mon Sep 17 00:00:00 2001
From: Dan <14043624+delivrance@users.noreply.github.com>
Date: Fri, 20 Nov 2020 01:53:19 +0100
Subject: [PATCH] Evaluate debug raw data only when actually needed #541

---
 pyrogram/session/session.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/pyrogram/session/session.py b/pyrogram/session/session.py
index 3aecaab3..490eea54 100644
--- a/pyrogram/session/session.py
+++ b/pyrogram/session/session.py
@@ -243,7 +243,10 @@ class Session:
             else [data]
         )
 
-        log.debug(f"Received:\n{data}")
+        # Call log.debug twice because calling it once by appending "data" to the previous string (i.e. f"Kind: {data}")
+        # will cause "data" to be evaluated as string every time instead of only when debug is actually enabled.
+        log.debug("Received:")
+        log.debug(data)
 
         for msg in messages:
             if msg.seq_no == 0:
@@ -367,7 +370,10 @@ class Session:
         if wait_response:
             self.results[msg_id] = Result()
 
-        log.debug(f"Sent:\n{message}")
+        # Call log.debug twice because calling it once by appending "data" to the previous string (i.e. f"Kind: {data}")
+        # will cause "data" to be evaluated as string every time instead of only when debug is actually enabled.
+        log.debug(f"Sent:")
+        log.debug(message)
 
         if len(message) <= self.EXECUTOR_SIZE_THRESHOLD:
             payload = mtproto.pack(