Inconsistent publish rate

[hasauino]

I experience inconsistent data rate when publishing at relatively high frequency.
For example, if the subscription consists of a single integer field, broadcasted in a loop at a rate of 10 Hz, the client receives the integer values at a non-constant rate; for a second the data is received fast, for another data slows down.
What could be the reason?

Subscription:

class MySubscription(channels_graphql_ws.Subscription):

    number = graphene.Int()

    @staticmethod
    def subscribe(root, info):
        return ["all"]

    @staticmethod
    def publish(payload, info):
        return MySubscription(number=payload["number"])

Thread that broadcasts integer values:

class Core(threading.Thread):
    def run(self):
        i = 0
        while True:
            sleep(0.1)
            i += 1
            print("\n\n broadcasted.. {}\n\n".format(i))
            from .schema import MySubscription
            MySubscription.broadcast(group="all", payload={"number": i})

And the consumer:

class MyGraphqlWsConsumer(channels_graphql_ws.GraphqlWsConsumer):

    schema = graphql_schema
    
    async def on_connect(self, payload):
        print("New client connected!")