Slow MassTransit bus startup

Program.cs

using System.Diagnostics;
using MassTransit;

var busControl = Bus.Factory.CreateUsingRabbitMq(cfg =>
{
    cfg.Host(new Uri($"amqps://rabbitmq:rabbitmq@localhost:5671/"));

    foreach (int i in Enumerable.Range(0, 50))
    {
        cfg.ReceiveEndpoint($"mt-test-{i}", e => { });
    }
});

var sw = Stopwatch.StartNew();
await busControl.StartAsync();
sw.Stop();

Console.WriteLine($"Elapsed {sw.Elapsed}");

await busControl.StopAsync();