From 6c4e1738e2fc6f1c6872d7729c72d79457c62c1e Mon Sep 17 00:00:00 2001
From: Daniel Hollas <daniel.hollas@bristol.ac.uk>
Date: Sun, 10 Dec 2023 02:03:15 +0000
Subject: [PATCH 1/2] Speed up import time of logging module

Delayed import of traceback results in ~16% speedup.
Issue #109653
---
 Lib/logging/__init__.py | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/Lib/logging/__init__.py b/Lib/logging/__init__.py
index eb7e020d1edfc0..d8cfe9400012f4 100644
--- a/Lib/logging/__init__.py
+++ b/Lib/logging/__init__.py
@@ -23,7 +23,10 @@
 To use, simply 'import logging' and log away!
 """
 
-import sys, os, time, io, re, traceback, warnings, weakref, collections.abc
+import sys, os, time, io, re, warnings, weakref, collections.abc
+
+# Speed up import time by delaying traceback import until needed
+traceback = None
 
 from types import GenericAlias
 from string import Template
@@ -653,6 +656,9 @@ def formatException(self, ei):
         This default implementation just uses
         traceback.print_exception()
         """
+        global traceback
+        if traceback is None:
+            import traceback
         sio = io.StringIO()
         tb = ei[2]
         # See issues #9427, #1553375. Commented out for now.
@@ -1061,6 +1067,9 @@ def handleError(self, record):
         The record which was being processed is passed in to this method.
         """
         if raiseExceptions and sys.stderr:  # see issue 13807
+            global traceback
+            if traceback is None:
+                import traceback
             exc = sys.exception()
             try:
                 sys.stderr.write('--- Logging error ---\n')
@@ -1601,6 +1610,9 @@ def findCaller(self, stack_info=False, stacklevel=1):
         co = f.f_code
         sinfo = None
         if stack_info:
+            global traceback
+            if traceback is None:
+                import traceback
             with io.StringIO() as sio:
                 sio.write("Stack (most recent call last):\n")
                 traceback.print_stack(f, file=sio)

From 5ae66a224d971c34df274b2dd544c846d762a592 Mon Sep 17 00:00:00 2001
From: Daniel Hollas <daniel.hollas@bristol.ac.uk>
Date: Tue, 12 Dec 2023 08:46:01 +0000
Subject: [PATCH 2/2] Add NEWS entry

---
 .../next/Library/2023-12-12-08-44-30.gh-issue-109653.ZCUa8H.rst  | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 Misc/NEWS.d/next/Library/2023-12-12-08-44-30.gh-issue-109653.ZCUa8H.rst

diff --git a/Misc/NEWS.d/next/Library/2023-12-12-08-44-30.gh-issue-109653.ZCUa8H.rst b/Misc/NEWS.d/next/Library/2023-12-12-08-44-30.gh-issue-109653.ZCUa8H.rst
new file mode 100644
index 00000000000000..847f03f9048220
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2023-12-12-08-44-30.gh-issue-109653.ZCUa8H.rst
@@ -0,0 +1 @@
+Reduce the import time of :mod:`logging` module by ~15%. Patch by Daniel Hollas.