[Technical Question] IoTHubModuleClient method send_message takes lot of time

Hi Team,

I am trying to use send_message method of the async IoTHubModuleClient class
```

# The client object is used to interact with your Azure IoT hub.
module_client = IoTHubModuleClient.create_from_edge_environment()

# Connect the client.
await module_client.connect()

async def send_test_message(i):
print("sending message #" + str(i))
msg = Message("test wind speed " + str(i))
msg.message_id = uuid.uuid4()
msg.correlation_id = "correlation-1234"
msg.custom_properties["tornado-warning"] = "yes"
await module_client.send_message(msg)
print("done sending message #" + str(i))
```

i tried measuring the time taken for **send_message** and it is around 300 milliseconds. Is there a way to reduce this time ?

No repository file or test is named; begin at the async IoTHubModuleClient.send_message entry point and compare timing around the await. A useful resolution would establish whether the reported ~300 ms is expected or identify a reproducible change that reduces it.

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