How long did it take to connect to socket io?

Send the duration(in ms) a client waited to connect to a Socket IO instance off to Google Analytics . I use this on PrimaryWall to make sure it’s not taking schools a long time to connect to walls. If I start to see this number getting bigger I know something is going wrong so I have an alert set if the average gets above 1000ms.

This code sends the ms it took from when the document was ready to when the socket was ready.

$(document).ready(function ()
{
  var socketConnectDuration = 0;
  setInterval ( socketConnectDurationIncrease, 100 );  // Start a timer
  socket.on('connect', function ()
  {
    _gaq.push(['_trackEvent', 'Connection duration', 'Connection duration', socketConnectDuration]); // Send the length of time to GA
....
  }
}

function socketConnectDurationIncrease(){
  socketConnectDuration = socketConnectDuration + 100;
}

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