Add a top level measure

synapse/http/server.py

@@ -104,6 +104,7 @@ def wrap_request_handler(request_handler, report_metrics):
         _next_request_id += 1
 
         with LoggingContext(request_id) as request_context:
+            with Measure(self.clock, "wrapped_request_handler"):
                 if report_metrics:
                     request_metrics = RequestMetrics()
                     request_metrics.start(self.clock)