perf: avoid regex re-compile (#2700)

* perf

* format

* avoid

* fix

starlette/responses.py

@@ -272,6 +272,9 @@ class RangeNotSatisfiable(Exception):
         self.max_size = max_size
 
 
+_RANGE_PATTERN = re.compile(r"(\d*)-(\d*)")
+
+
 class FileResponse(Response):
     chunk_size = 64 * 1024
 
@@ -453,7 +456,7 @@ class FileResponse(Response):
                 int(_[0]) if _[0] else file_size - int(_[1]),
                 int(_[1]) + 1 if _[0] and _[1] and int(_[1]) < file_size else file_size,
             )
-            for _ in re.findall(r"(\d*)-(\d*)", range_)
+            for _ in _RANGE_PATTERN.findall(range_)
             if _ != ("", "")
         ]
 

starlette/schemas.py

@@ -29,6 +29,9 @@ class EndpointInfo(typing.NamedTuple):
     func: typing.Callable[..., typing.Any]
 
 
+_remove_converter_pattern = re.compile(r":\w+}")
+
+
 class BaseSchemaGenerator:
     def get_schema(self, routes: list[BaseRoute]) -> dict[str, typing.Any]:
         raise NotImplementedError()  # pragma: no cover
@@ -89,7 +92,7 @@ class BaseSchemaGenerator:
             Route("/users/{id:int}", endpoint=get_user, methods=["GET"])
         Should be represented as `/users/{id}` in the OpenAPI schema.
         """
-        return re.sub(r":\w+}", "}", path)
+        return _remove_converter_pattern.sub("}", path)
 
     def parse_docstring(self, func_or_method: typing.Callable[..., typing.Any]) -> dict[str, typing.Any]:
         """