diff --git a/HISTORY.rst b/HISTORY.rst
index 09ec4253..2236a97d 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -2,6 +2,11 @@
 History
 =======
 
+* Switch from ``urlparse()`` to ``urlsplit()`` for URL parsing, reducing the middleware runtime up to 5%.
+  This changes the type passed to ``origin_found_in_white_lists()``, so if you have subclassed the middleware to override this method, you should check it is compatible (it most likely is).
+
+  Thanks to Thibaut Decombe in `PR #793 <https://github.com/adamchainz/django-cors-headers/pull/793>`__.
+
 3.13.0 (2022-06-05)
 -------------------
 
diff --git a/src/corsheaders/checks.py b/src/corsheaders/checks.py
index 45d4461b..e56e1086 100644
--- a/src/corsheaders/checks.py
+++ b/src/corsheaders/checks.py
@@ -3,7 +3,7 @@
 import re
 from collections.abc import Sequence
 from typing import Any
-from urllib.parse import urlparse
+from urllib.parse import urlsplit
 
 from django.apps import AppConfig
 from django.conf import settings
@@ -87,7 +87,7 @@ def check_settings(app_configs: list[AppConfig], **kwargs: Any) -> list[CheckMes
         for origin in conf.CORS_ALLOWED_ORIGINS:
             if origin in special_origin_values:
                 continue
-            parsed = urlparse(origin)
+            parsed = urlsplit(origin)
             if parsed.scheme == "" or parsed.netloc == "":
                 errors.append(
                     Error(
@@ -104,7 +104,7 @@ def check_settings(app_configs: list[AppConfig], **kwargs: Any) -> list[CheckMes
             else:
                 # Only do this check in this case because if the scheme is not
                 # provided, netloc ends up in path
-                for part in ("path", "params", "query", "fragment"):
+                for part in ("path", "query", "fragment"):
                     if getattr(parsed, part) != "":
                         errors.append(
                             Error(
diff --git a/src/corsheaders/middleware.py b/src/corsheaders/middleware.py
index 381f8875..226a4ba9 100644
--- a/src/corsheaders/middleware.py
+++ b/src/corsheaders/middleware.py
@@ -2,7 +2,7 @@
 
 import re
 from typing import Any
-from urllib.parse import ParseResult, urlparse
+from urllib.parse import SplitResult, urlsplit
 
 from django.http import HttpRequest, HttpResponse
 from django.utils.cache import patch_vary_headers
@@ -61,7 +61,7 @@ def _https_referer_replace(self, request: HttpRequest) -> None:
             and "ORIGINAL_HTTP_REFERER" not in request.META
         ):
 
-            url = urlparse(origin)
+            url = urlsplit(origin)
             if (
                 not conf.CORS_ALLOW_ALL_ORIGINS
                 and not self.origin_found_in_white_lists(origin, url)
@@ -137,7 +137,7 @@ def process_response(
             return response
 
         try:
-            url = urlparse(origin)
+            url = urlsplit(origin)
         except ValueError:
             return response
 
@@ -169,7 +169,7 @@ def process_response(
 
         return response
 
-    def origin_found_in_white_lists(self, origin: str, url: ParseResult) -> bool:
+    def origin_found_in_white_lists(self, origin: str, url: SplitResult) -> bool:
         return (
             (origin == "null" and origin in conf.CORS_ALLOWED_ORIGINS)
             or self._url_in_whitelist(url)
@@ -191,8 +191,8 @@ def check_signal(self, request: HttpRequest) -> bool:
         signal_responses = check_request_enabled.send(sender=None, request=request)
         return any(return_value for function, return_value in signal_responses)
 
-    def _url_in_whitelist(self, url: ParseResult) -> bool:
-        origins = [urlparse(o) for o in conf.CORS_ALLOWED_ORIGINS]
+    def _url_in_whitelist(self, url: SplitResult) -> bool:
+        origins = [urlsplit(o) for o in conf.CORS_ALLOWED_ORIGINS]
         return any(
             origin.scheme == url.scheme and origin.netloc == url.netloc
             for origin in origins