Fixed #30899 -- Lazily compiled import time regular expressions.

2 files changed, 4 insertions, 2 deletions

diff --git a/django/db/backends/sqlite3/base.py b/django/db/backends/sqlite3/base.py
index f959f921f1..45a22f5a36 100644
--- a/django/db/backends/sqlite3/base.py
+++ b/django/db/backends/sqlite3/base.py
@@ -23,6 +23,7 @@ from django.utils import timezone
 from django.utils.asyncio import async_unsafe
 from django.utils.dateparse import parse_datetime, parse_time
 from django.utils.duration import duration_microseconds
+from django.utils.regex_helper import _lazy_re_compile
 
 from .client import DatabaseClient                          # isort:skip
 from .creation import DatabaseCreation                      # isort:skip
@@ -380,7 +381,7 @@ class DatabaseWrapper(BaseDatabaseWrapper):
         return self.creation.is_in_memory_db(self.settings_dict['NAME'])
 
 
-FORMAT_QMARK_REGEX = re.compile(r'(?<!%)%s')
+FORMAT_QMARK_REGEX = _lazy_re_compile(r'(?<!%)%s')
 
 
 class SQLiteCursorWrapper(Database.Cursor):
diff --git a/django/db/backends/sqlite3/introspection.py b/django/db/backends/sqlite3/introspection.py
index 5e33d2a7e2..5186e6d14b 100644
--- a/django/db/backends/sqlite3/introspection.py
+++ b/django/db/backends/sqlite3/introspection.py
@@ -7,10 +7,11 @@ from django.db.backends.base.introspection import (
     BaseDatabaseIntrospection, FieldInfo as BaseFieldInfo, TableInfo,
 )
 from django.db.models.indexes import Index
+from django.utils.regex_helper import _lazy_re_compile
 
 FieldInfo = namedtuple('FieldInfo', BaseFieldInfo._fields + ('pk',))
 
-field_size_re = re.compile(r'^\s*(?:var)?char\s*\(\s*(\d+)\s*\)\s*$')
+field_size_re = _lazy_re_compile(r'^\s*(?:var)?char\s*\(\s*(\d+)\s*\)\s*$')
 
 
 def get_field_size(name):