title: asp.net core SignalR performance - send to each client vs send to all
body: <p>I cant find any SignalR performance docs. And I dont know how to stage a 1000 users test.</p>
  <p>My question is: <strong>in case of 1000 clients - how different is sending to each vs to all clients performance-wise:</strong></p>
  <pre><code>for(int i = 0; i &lt; 100; i++)
    hub.Clients.Client(connected[i]).SendAsync..
  
  vs.
  
  hub.Clients.All.SendAsync..
  </code></pre>