Socket.IO Why slow data distribution to all clients?

Question

JavaScript

I have for example 50 connections, then the delay is about 50-70ms.
It sends data to each client separately in about 1ms. Is there any way to speed up the sending of packets?
I send data like this:
io.sockets.emit('refresh', data);

Answer 1

Most likely due to iron, since it is an asynchronous engine.
what iron do you have?