Optimize

aiohttp/web_urldispatcher.py

@@ -495,6 +495,7 @@ def __init__(self, prefix: str, *, name: Optional[str] = None) -> None:
         assert prefix in ("", "/") or not prefix.endswith("/"), prefix
         super().__init__(name=name)
         self._prefix = _requote_path(prefix)
+        self._prefix2 = self._prefix + "/"
 
     @property
     def canonical(self) -> str:
@@ -505,6 +506,7 @@ def add_prefix(self, prefix: str) -> None:
         assert not prefix.endswith("/")
         assert len(prefix) > 1
         self._prefix = prefix + self._prefix
+        self._prefix2 = self._prefix + "/"
 
     def raw_match(self, prefix: str) -> bool:
         return False
@@ -616,7 +618,7 @@ async def resolve(self, request: Request) -> _Resolve:
         path = request.rel_url.raw_path
         method = request.method
         allowed_methods = set(self._routes)
-        if not path.startswith(self._prefix + "/") and path != self._prefix:
+        if not path.startswith(self._prefix2) and path != self._prefix:
             return None, set()
 
         if method not in allowed_methods:
@@ -732,7 +734,7 @@ def get_info(self) -> _InfoDict:
 
     async def resolve(self, request: Request) -> _Resolve:
         if (
-            not request.url.raw_path.startswith(self._prefix + "/")
+            not request.url.raw_path.startswith(self._prefix2)
             and request.url.raw_path != self._prefix
         ):
             return None, set()