From f2366f8cbfc0d0d90b45bd2815f2503c644ff536 Mon Sep 17 00:00:00 2001
From: donBarbos <donbarbos@proton.me>
Date: Sat, 8 Feb 2025 22:25:51 +0400
Subject: [PATCH 1/3] Always lazy import re in locale

---
 Lib/locale.py                                            | 9 +++++----
 .../2025-02-08-21-37-05.gh-issue-118761.EtqxeB.rst       | 2 ++
 2 files changed, 7 insertions(+), 4 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Library/2025-02-08-21-37-05.gh-issue-118761.EtqxeB.rst

diff --git a/Lib/locale.py b/Lib/locale.py
index 213d5e93418cfb..13ec9c8829d186 100644
--- a/Lib/locale.py
+++ b/Lib/locale.py
@@ -13,7 +13,6 @@
 import sys
 import encodings
 import encodings.aliases
-import re
 import _collections_abc
 from builtins import str as _builtin_str
 import functools
@@ -177,9 +176,6 @@ def _strip_padding(s, amount):
         amount -= 1
     return s[lpos:rpos+1]
 
-_percent_re = re.compile(r'%(?:\((?P<key>.*?)\))?'
-                         r'(?P<modifiers>[-#0-9 +*.hlL]*?)[eEfFgGdiouxXcrs%]')
-
 def _format(percent, value, grouping=False, monetary=False, *additional):
     if additional:
         formatted = percent % ((value,) + additional)
@@ -217,6 +213,11 @@ def format_string(f, val, grouping=False, monetary=False):
     Grouping is applied if the third parameter is true.
     Conversion uses monetary thousands separator and grouping strings if
     forth parameter monetary is true."""
+    import re
+
+    _percent_re = re.compile(r'%(?:\((?P<key>.*?)\))?(?P<modifiers'
+                             r'>[-#0-9 +*.hlL]*?)[eEfFgGdiouxXcrs%]')
+
     percents = list(_percent_re.finditer(f))
     new_f = _percent_re.sub('%s', f)
 
diff --git a/Misc/NEWS.d/next/Library/2025-02-08-21-37-05.gh-issue-118761.EtqxeB.rst b/Misc/NEWS.d/next/Library/2025-02-08-21-37-05.gh-issue-118761.EtqxeB.rst
new file mode 100644
index 00000000000000..b35275b321b4b2
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-02-08-21-37-05.gh-issue-118761.EtqxeB.rst
@@ -0,0 +1,2 @@
+Improve import time of :mod:`locale` using lazy import ``re``. Patch by
+Semyon Moroz.

From bca13804703451b715cfb5c5b0710ee8d0822f53 Mon Sep 17 00:00:00 2001
From: donBarbos <donbarbos@proton.me>
Date: Sun, 9 Feb 2025 04:50:56 +0400
Subject: [PATCH 2/3] Back performance to re

---
 Lib/locale.py | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/Lib/locale.py b/Lib/locale.py
index 13ec9c8829d186..92efb576ec7676 100644
--- a/Lib/locale.py
+++ b/Lib/locale.py
@@ -176,6 +176,8 @@ def _strip_padding(s, amount):
         amount -= 1
     return s[lpos:rpos+1]
 
+_percent_re = None
+
 def _format(percent, value, grouping=False, monetary=False, *additional):
     if additional:
         formatted = percent % ((value,) + additional)
@@ -213,10 +215,12 @@ def format_string(f, val, grouping=False, monetary=False):
     Grouping is applied if the third parameter is true.
     Conversion uses monetary thousands separator and grouping strings if
     forth parameter monetary is true."""
-    import re
+    if _percent_re is None:
+        import re
 
-    _percent_re = re.compile(r'%(?:\((?P<key>.*?)\))?(?P<modifiers'
-                             r'>[-#0-9 +*.hlL]*?)[eEfFgGdiouxXcrs%]')
+        global _percent_re
+        _percent_re = re.compile(r'%(?:\((?P<key>.*?)\))?(?P<modifiers'
+                                 r'>[-#0-9 +*.hlL]*?)[eEfFgGdiouxXcrs%]')
 
     percents = list(_percent_re.finditer(f))
     new_f = _percent_re.sub('%s', f)

From 5e08b48d22cca84f4d7b30d5d90a3237b1ba2400 Mon Sep 17 00:00:00 2001
From: donBarbos <donbarbos@proton.me>
Date: Sun, 9 Feb 2025 04:56:13 +0400
Subject: [PATCH 3/3] Fix bug

---
 Lib/locale.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/locale.py b/Lib/locale.py
index 92efb576ec7676..2feb10e59c96a3 100644
--- a/Lib/locale.py
+++ b/Lib/locale.py
@@ -215,10 +215,10 @@ def format_string(f, val, grouping=False, monetary=False):
     Grouping is applied if the third parameter is true.
     Conversion uses monetary thousands separator and grouping strings if
     forth parameter monetary is true."""
+    global _percent_re
     if _percent_re is None:
         import re
 
-        global _percent_re
         _percent_re = re.compile(r'%(?:\((?P<key>.*?)\))?(?P<modifiers'
                                  r'>[-#0-9 +*.hlL]*?)[eEfFgGdiouxXcrs%]')
 

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