manage.py

#!/usr/bin/env python
import os
import sys

from django.core.management import execute_from_command_line

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "slash_test_settings")
execute_from_command_line(sys.argv)

slash_test_settings.py

ALLOWED_HOSTS = ["127.0.0.1"]
# APPEND_SLASH = False
MIDDLEWARE = ["django.middleware.common.CommonMiddleware"]
ROOT_URLCONF = "slash_test_urls"
SECRET_KEY = "sekrit"

slash_test_urls.py

from django.http import HttpResponse
from django.urls import path


def view(request):
    return HttpResponse("ok")


urlpatterns = [path(f"url{n}", view) for n in range(10000)]