Add benchmarks for web middleware

tests/test_benchmarks_web_middleware.py

@@ -0,0 +1,43 @@
+"""codspeed benchmarks for web middlewares."""
+
+import asyncio
+
+from pytest_codspeed import BenchmarkFixture
+
+from aiohttp import web
+from aiohttp.pytest_plugin import AiohttpClient
+from aiohttp.typedefs import Handler
+
+
+def test_ten_web_middlewares(
+    benchmark: BenchmarkFixture,
+    loop: asyncio.AbstractEventLoop,
+    aiohttp_client: AiohttpClient,
+) -> None:
+    """Benchmark 100 requests with 10 middlewares."""
+    message_count = 100
+
+    async def handler(request: web.Request) -> web.Response:
+        return web.Response()
+
+    app = web.Application()
+    app.router.add_route("GET", "/", handler)
+
+    class MiddlewareClass:
+        async def call(
+            self, request: web.Request, handler: Handler
+        ) -> web.StreamResponse:
+            return await handler(request)
+
+    for _ in range(10):
+        app.middlewares.append(MiddlewareClass().call)
+
+    async def run_client_benchmark() -> None:
+        client = await aiohttp_client(app)
+        for _ in range(message_count):
+            await client.get("/")
+        await client.close()
+
+    @benchmark
+    def _run() -> None:
+        loop.run_until_complete(run_client_benchmark())