diff --git a/CHANGES/9200.breaking.rst b/CHANGES/9200.breaking.rst
new file mode 100644
index 00000000000..0282e165c41
--- /dev/null
+++ b/CHANGES/9200.breaking.rst
@@ -0,0 +1,3 @@
+Improved middleware performance -- by :user:`bdraco`.
+
+The ``set_current_app`` method was removed from ``UrlMappingMatchInfo`` because it is no longer used, and it was unlikely external caller would ever use it.
diff --git a/aiohttp/web_middlewares.py b/aiohttp/web_middlewares.py
index 5da1533c0df..2f1f5f58e6e 100644
--- a/aiohttp/web_middlewares.py
+++ b/aiohttp/web_middlewares.py
@@ -110,7 +110,12 @@ async def impl(request: Request, handler: Handler) -> StreamResponse:
 def _fix_request_current_app(app: "Application") -> Middleware:
     @middleware
     async def impl(request: Request, handler: Handler) -> StreamResponse:
-        with request.match_info.set_current_app(app):
+        match_info = request.match_info
+        prev = match_info.current_app
+        match_info.current_app = app
+        try:
             return await handler(request)
+        finally:
+            match_info.current_app = prev
 
     return impl
diff --git a/aiohttp/web_urldispatcher.py b/aiohttp/web_urldispatcher.py
index c302351500b..0f6d1b2bcd6 100644
--- a/aiohttp/web_urldispatcher.py
+++ b/aiohttp/web_urldispatcher.py
@@ -10,7 +10,6 @@
 import re
 import sys
 import warnings
-from contextlib import contextmanager
 from functools import wraps
 from pathlib import Path
 from types import MappingProxyType
@@ -293,8 +292,8 @@ def current_app(self) -> "Application":
         assert app is not None
         return app
 
-    @contextmanager
-    def set_current_app(self, app: "Application") -> Generator[None, None, None]:
+    @current_app.setter
+    def current_app(self, app: "Application") -> None:
         if DEBUG:  # pragma: no cover
             if app not in self._apps:
                 raise RuntimeError(
@@ -302,12 +301,7 @@ def set_current_app(self, app: "Application") -> Generator[None, None, None]:
                         self._apps, app
                     )
                 )
-        prev = self._current_app
         self._current_app = app
-        try:
-            yield
-        finally:
-            self._current_app = prev
 
     def freeze(self) -> None:
         self._frozen = True